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Finding the Fourth Proportional to 359,385.80, 539,078.70 and 219,417.80

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Solution

The fourth proportional to 359,385.80, 539,078.70 and 219,417.80 is: 329,126.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,385.80 : 539,078.70 = 219,417.80 : x
  2. Step 2: Convert to fraction form
    359,385.80/539,078.70 = 219,417.80/x
  3. Step 3: Cross multiply
    359,385.80x = 539,078.70 × 219,417.80
  4. Step 4: Simplify right side
    359,385.80x = 118,283,462,380.86
  5. Step 5: Solve for x
    x = 118,283,462,380.86/359,385.80
  6. Step 6: Final answer
    x = 329,126.70

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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.