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Finding the Fourth Proportional to 261,686.70, 392,530.05 and 64,694.70

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Solution

The fourth proportional to 261,686.70, 392,530.05 and 64,694.70 is: 97,042.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,686.70 : 392,530.05 = 64,694.70 : x
  2. Step 2: Convert to fraction form
    261,686.70/392,530.05 = 64,694.70/x
  3. Step 3: Cross multiply
    261,686.70x = 392,530.05 × 64,694.70
  4. Step 4: Simplify right side
    261,686.70x = 25,394,613,825.74
  5. Step 5: Solve for x
    x = 25,394,613,825.74/261,686.70
  6. Step 6: Final answer
    x = 97,042.05

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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.