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Finding the Fourth Proportional to 528,081.20, 792,121.80 and 261,882.80

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Solution

The fourth proportional to 528,081.20, 792,121.80 and 261,882.80 is: 392,824.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,081.20 : 792,121.80 = 261,882.80 : x
  2. Step 2: Convert to fraction form
    528,081.20/792,121.80 = 261,882.80/x
  3. Step 3: Cross multiply
    528,081.20x = 792,121.80 × 261,882.80
  4. Step 4: Simplify right side
    528,081.20x = 207,443,074,925.04
  5. Step 5: Solve for x
    x = 207,443,074,925.04/528,081.20
  6. Step 6: Final answer
    x = 392,824.20

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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.