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Finding the Fourth Proportional to 861,000.64, 1,188,156 and 479,040.64

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Solution

The fourth proportional to 861,000.64, 1,188,156 and 479,040.64 is: 661,062.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,000.64 : 1,188,156 = 479,040.64 : x
  2. Step 2: Convert to fraction form
    861,000.64/1,188,156 = 479,040.64/x
  3. Step 3: Cross multiply
    861,000.64x = 1,188,156 × 479,040.64
  4. Step 4: Simplify right side
    861,000.64x = 569,175,010,659.84
  5. Step 5: Solve for x
    x = 569,175,010,659.84/861,000.64
  6. Step 6: Final answer
    x = 661,062.24

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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.