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Finding the Fourth Proportional to 359,490.60, 538,803.90 and 149,020.20

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Solution

The fourth proportional to 359,490.60, 538,803.90 and 149,020.20 is: 223,351.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,490.60 : 538,803.90 = 149,020.20 : x
  2. Step 2: Convert to fraction form
    359,490.60/538,803.90 = 149,020.20/x
  3. Step 3: Cross multiply
    359,490.60x = 538,803.90 × 149,020.20
  4. Step 4: Simplify right side
    359,490.60x = 80,292,664,938.78
  5. Step 5: Solve for x
    x = 80,292,664,938.78/359,490.60
  6. Step 6: Final answer
    x = 223,351.22

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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.