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Finding the Fourth Proportional to 520,908.60, 781,362.90 and 359,945.40

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Solution

The fourth proportional to 520,908.60, 781,362.90 and 359,945.40 is: 539,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,908.60 : 781,362.90 = 359,945.40 : x
  2. Step 2: Convert to fraction form
    520,908.60/781,362.90 = 359,945.40/x
  3. Step 3: Cross multiply
    520,908.60x = 781,362.90 × 359,945.40
  4. Step 4: Simplify right side
    520,908.60x = 281,247,981,585.66
  5. Step 5: Solve for x
    x = 281,247,981,585.66/520,908.60
  6. Step 6: Final answer
    x = 539,918.10

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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.