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Finding the Fourth Proportional to 359,748, 539,648.16 and 138,132

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Solution

The fourth proportional to 359,748, 539,648.16 and 138,132 is: 207,208.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,748 : 539,648.16 = 138,132 : x
  2. Step 2: Convert to fraction form
    359,748/539,648.16 = 138,132/x
  3. Step 3: Cross multiply
    359,748x = 539,648.16 × 138,132
  4. Step 4: Simplify right side
    359,748x = 74,542,679,637.12
  5. Step 5: Solve for x
    x = 74,542,679,637.12/359,748
  6. Step 6: Final answer
    x = 207,208.04

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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.