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Finding the Fourth Proportional to 359,387.80, 539,081.70 and 219,419.80

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Solution

The fourth proportional to 359,387.80, 539,081.70 and 219,419.80 is: 329,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,387.80 : 539,081.70 = 219,419.80 : x
  2. Step 2: Convert to fraction form
    359,387.80/539,081.70 = 219,419.80/x
  3. Step 3: Cross multiply
    359,387.80x = 539,081.70 × 219,419.80
  4. Step 4: Simplify right side
    359,387.80x = 118,285,198,797.66
  5. Step 5: Solve for x
    x = 118,285,198,797.66/359,387.80
  6. Step 6: Final answer
    x = 329,129.70

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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.