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Finding the Fourth Proportional to 402,685.38, 555,123.78 and 266,491.17

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Solution

The fourth proportional to 402,685.38, 555,123.78 and 266,491.17 is: 367,372.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,685.38 : 555,123.78 = 266,491.17 : x
  2. Step 2: Convert to fraction form
    402,685.38/555,123.78 = 266,491.17/x
  3. Step 3: Cross multiply
    402,685.38x = 555,123.78 × 266,491.17
  4. Step 4: Simplify right side
    402,685.38x = 147,935,585,627.02
  5. Step 5: Solve for x
    x = 147,935,585,627.02/402,685.38
  6. Step 6: Final answer
    x = 367,372.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.