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Finding the Fourth Proportional to 390,608.98, 539,044.68 and 229,470.82

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Solution

The fourth proportional to 390,608.98, 539,044.68 and 229,470.82 is: 316,672.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,608.98 : 539,044.68 = 229,470.82 : x
  2. Step 2: Convert to fraction form
    390,608.98/539,044.68 = 229,470.82/x
  3. Step 3: Cross multiply
    390,608.98x = 539,044.68 × 229,470.82
  4. Step 4: Simplify right side
    390,608.98x = 123,695,024,736.24
  5. Step 5: Solve for x
    x = 123,695,024,736.24/390,608.98
  6. Step 6: Final answer
    x = 316,672.25

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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.