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Finding the Fourth Proportional to 402,494.91, 554,857.71 and 281,259.93

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Solution

The fourth proportional to 402,494.91, 554,857.71 and 281,259.93 is: 387,729.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,494.91 : 554,857.71 = 281,259.93 : x
  2. Step 2: Convert to fraction form
    402,494.91/554,857.71 = 281,259.93/x
  3. Step 3: Cross multiply
    402,494.91x = 554,857.71 × 281,259.93
  4. Step 4: Simplify right side
    402,494.91x = 156,059,240,674.56
  5. Step 5: Solve for x
    x = 156,059,240,674.56/402,494.91
  6. Step 6: Final answer
    x = 387,729.72

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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.