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Finding the Fourth Proportional to 359,656, 539,509.92 and 138,040

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Solution

The fourth proportional to 359,656, 539,509.92 and 138,040 is: 207,069.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,656 : 539,509.92 = 138,040 : x
  2. Step 2: Convert to fraction form
    359,656/539,509.92 = 138,040/x
  3. Step 3: Cross multiply
    359,656x = 539,509.92 × 138,040
  4. Step 4: Simplify right side
    359,656x = 74,473,949,356.80
  5. Step 5: Solve for x
    x = 74,473,949,356.80/359,656
  6. Step 6: Final answer
    x = 207,069.95

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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.