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Finding the Fourth Proportional to 520,666.70, 781,722.85 and 268,127.74

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Solution

The fourth proportional to 520,666.70, 781,722.85 and 268,127.74 is: 402,563.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,666.70 : 781,722.85 = 268,127.74 : x
  2. Step 2: Convert to fraction form
    520,666.70/781,722.85 = 268,127.74/x
  3. Step 3: Cross multiply
    520,666.70x = 781,722.85 × 268,127.74
  4. Step 4: Simplify right side
    520,666.70x = 209,601,578,452.23
  5. Step 5: Solve for x
    x = 209,601,578,452.23/520,666.70
  6. Step 6: Final answer
    x = 402,563.82

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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.