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Finding the Fourth Proportional to 603,432.60, 905,148.90 and 393,480.60

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Solution

The fourth proportional to 603,432.60, 905,148.90 and 393,480.60 is: 590,220.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,432.60 : 905,148.90 = 393,480.60 : x
  2. Step 2: Convert to fraction form
    603,432.60/905,148.90 = 393,480.60/x
  3. Step 3: Cross multiply
    603,432.60x = 905,148.90 × 393,480.60
  4. Step 4: Simplify right side
    603,432.60x = 356,158,532,261.34
  5. Step 5: Solve for x
    x = 356,158,532,261.34/603,432.60
  6. Step 6: Final answer
    x = 590,220.90

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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.