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Finding the Fourth Proportional to 261,562.50, 392,347.40 and 74,574

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Solution

The fourth proportional to 261,562.50, 392,347.40 and 74,574 is: 111,862.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,562.50 : 392,347.40 = 74,574 : x
  2. Step 2: Convert to fraction form
    261,562.50/392,347.40 = 74,574/x
  3. Step 3: Cross multiply
    261,562.50x = 392,347.40 × 74,574
  4. Step 4: Simplify right side
    261,562.50x = 29,258,914,634.73
  5. Step 5: Solve for x
    x = 29,258,914,634.73/261,562.50
  6. Step 6: Final answer
    x = 111,862.04

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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.