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Finding the Fourth Proportional to 603,619,990.90, 905,429,986.35 and 603,619,990.90

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Solution

The fourth proportional to 603,619,990.90, 905,429,986.35 and 603,619,990.90 is: 905,429,986.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,619,990.90 : 905,429,986.35 = 603,619,990.90 : x
  2. Step 2: Convert to fraction form
    603,619,990.90/905,429,986.35 = 603,619,990.90/x
  3. Step 3: Cross multiply
    603,619,990.90x = 905,429,986.35 × 603,619,990.90
  4. Step 4: Simplify right side
    603,619,990.90x = 546,535,640,121,174,144
  5. Step 5: Solve for x
    x = 546,535,640,121,174,144/603,619,990.90
  6. Step 6: Final answer
    x = 905,429,986.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.