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Finding the Fourth Proportional to 520,103.55, 780,155.33 and 481,223.55

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Solution

The fourth proportional to 520,103.55, 780,155.33 and 481,223.55 is: 721,835.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,103.55 : 780,155.33 = 481,223.55 : x
  2. Step 2: Convert to fraction form
    520,103.55/780,155.33 = 481,223.55/x
  3. Step 3: Cross multiply
    520,103.55x = 780,155.33 × 481,223.55
  4. Step 4: Simplify right side
    520,103.55x = 375,429,115,047.90
  5. Step 5: Solve for x
    x = 375,429,115,047.90/520,103.55
  6. Step 6: Final answer
    x = 721,835.33

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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.