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Finding the Fourth Proportional to 261,967.80, 392,951.70 and 84,480.60

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Solution

The fourth proportional to 261,967.80, 392,951.70 and 84,480.60 is: 126,720.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,967.80 : 392,951.70 = 84,480.60 : x
  2. Step 2: Convert to fraction form
    261,967.80/392,951.70 = 84,480.60/x
  3. Step 3: Cross multiply
    261,967.80x = 392,951.70 × 84,480.60
  4. Step 4: Simplify right side
    261,967.80x = 33,196,795,387.02
  5. Step 5: Solve for x
    x = 33,196,795,387.02/261,967.80
  6. Step 6: Final answer
    x = 126,720.90

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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.