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Finding the Fourth Proportional to 261,379.20, 392,068.80 and 239,260.80

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Solution

The fourth proportional to 261,379.20, 392,068.80 and 239,260.80 is: 358,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,379.20 : 392,068.80 = 239,260.80 : x
  2. Step 2: Convert to fraction form
    261,379.20/392,068.80 = 239,260.80/x
  3. Step 3: Cross multiply
    261,379.20x = 392,068.80 × 239,260.80
  4. Step 4: Simplify right side
    261,379.20x = 93,806,694,743.04
  5. Step 5: Solve for x
    x = 93,806,694,743.04/261,379.20
  6. Step 6: Final answer
    x = 358,891.20

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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.