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Finding the Fourth Proportional to 261,939.28, 392,963.52 and 84,464.20

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Solution

The fourth proportional to 261,939.28, 392,963.52 and 84,464.20 is: 126,713.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,939.28 : 392,963.52 = 84,464.20 : x
  2. Step 2: Convert to fraction form
    261,939.28/392,963.52 = 84,464.20/x
  3. Step 3: Cross multiply
    261,939.28x = 392,963.52 × 84,464.20
  4. Step 4: Simplify right side
    261,939.28x = 33,191,349,345.98
  5. Step 5: Solve for x
    x = 33,191,349,345.98/261,939.28
  6. Step 6: Final answer
    x = 126,713.91

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1.5x scale

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.