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Finding the Fourth Proportional to 520,981.20, 781,471.80 and 166,021.20

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Solution

The fourth proportional to 520,981.20, 781,471.80 and 166,021.20 is: 249,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,981.20 : 781,471.80 = 166,021.20 : x
  2. Step 2: Convert to fraction form
    520,981.20/781,471.80 = 166,021.20/x
  3. Step 3: Cross multiply
    520,981.20x = 781,471.80 × 166,021.20
  4. Step 4: Simplify right side
    520,981.20x = 129,740,886,002.16
  5. Step 5: Solve for x
    x = 129,740,886,002.16/520,981.20
  6. Step 6: Final answer
    x = 249,031.80

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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.