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Finding the Fourth Proportional to 292,711.80, 439,067.70 and 288,046.20

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Solution

The fourth proportional to 292,711.80, 439,067.70 and 288,046.20 is: 432,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,711.80 : 439,067.70 = 288,046.20 : x
  2. Step 2: Convert to fraction form
    292,711.80/439,067.70 = 288,046.20/x
  3. Step 3: Cross multiply
    292,711.80x = 439,067.70 × 288,046.20
  4. Step 4: Simplify right side
    292,711.80x = 126,471,782,527.74
  5. Step 5: Solve for x
    x = 126,471,782,527.74/292,711.80
  6. Step 6: Final answer
    x = 432,069.30

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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.