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Finding the Fourth Proportional to 680,978.80, 1,021,468.20 and 576,002.80

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Solution

The fourth proportional to 680,978.80, 1,021,468.20 and 576,002.80 is: 864,004.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,978.80 : 1,021,468.20 = 576,002.80 : x
  2. Step 2: Convert to fraction form
    680,978.80/1,021,468.20 = 576,002.80/x
  3. Step 3: Cross multiply
    680,978.80x = 1,021,468.20 × 576,002.80
  4. Step 4: Simplify right side
    680,978.80x = 588,368,543,310.96
  5. Step 5: Solve for x
    x = 588,368,543,310.96/680,978.80
  6. Step 6: Final answer
    x = 864,004.20

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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.