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Finding the Fourth Proportional to 768,479.63, 1,060,502.49 and 428,947.88

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Solution

The fourth proportional to 768,479.63, 1,060,502.49 and 428,947.88 is: 591,948.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,479.63 : 1,060,502.49 = 428,947.88 : x
  2. Step 2: Convert to fraction form
    768,479.63/1,060,502.49 = 428,947.88/x
  3. Step 3: Cross multiply
    768,479.63x = 1,060,502.49 × 428,947.88
  4. Step 4: Simplify right side
    768,479.63x = 454,900,289,517.71
  5. Step 5: Solve for x
    x = 454,900,289,517.71/768,479.63
  6. Step 6: Final answer
    x = 591,948.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.