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Finding the Fourth Proportional to 261,397.28, 392,094 and 74,408.48

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Solution

The fourth proportional to 261,397.28, 392,094 and 74,408.48 is: 111,612.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,397.28 : 392,094 = 74,408.48 : x
  2. Step 2: Convert to fraction form
    261,397.28/392,094 = 74,408.48/x
  3. Step 3: Cross multiply
    261,397.28x = 392,094 × 74,408.48
  4. Step 4: Simplify right side
    261,397.28x = 29,175,118,557.12
  5. Step 5: Solve for x
    x = 29,175,118,557.12/261,397.28
  6. Step 6: Final answer
    x = 111,612.17

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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.