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Finding the Fourth Proportional to 392,817.69, 542,073.13 and 240,111.56

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Solution

The fourth proportional to 392,817.69, 542,073.13 and 240,111.56 is: 331,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,817.69 : 542,073.13 = 240,111.56 : x
  2. Step 2: Convert to fraction form
    392,817.69/542,073.13 = 240,111.56/x
  3. Step 3: Cross multiply
    392,817.69x = 542,073.13 × 240,111.56
  4. Step 4: Simplify right side
    392,817.69x = 130,158,025,633.29
  5. Step 5: Solve for x
    x = 130,158,025,633.29/392,817.69
  6. Step 6: Final answer
    x = 331,344.61

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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.