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Finding the Fourth Proportional to 768,275.30, 1,060,320.23 and 428,814.02

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Solution

The fourth proportional to 768,275.30, 1,060,320.23 and 428,814.02 is: 591,819.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,275.30 : 1,060,320.23 = 428,814.02 : x
  2. Step 2: Convert to fraction form
    768,275.30/1,060,320.23 = 428,814.02/x
  3. Step 3: Cross multiply
    768,275.30x = 1,060,320.23 × 428,814.02
  4. Step 4: Simplify right side
    768,275.30x = 454,680,172,867.95
  5. Step 5: Solve for x
    x = 454,680,172,867.95/768,275.30
  6. Step 6: Final answer
    x = 591,819.33

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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.