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Finding the Fourth Proportional to 867,633.10, 1,301,449.65 and 861,728.20

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Solution

The fourth proportional to 867,633.10, 1,301,449.65 and 861,728.20 is: 1,292,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,633.10 : 1,301,449.65 = 861,728.20 : x
  2. Step 2: Convert to fraction form
    867,633.10/1,301,449.65 = 861,728.20/x
  3. Step 3: Cross multiply
    867,633.10x = 1,301,449.65 × 861,728.20
  4. Step 4: Simplify right side
    867,633.10x = 1,121,495,864,285.13
  5. Step 5: Solve for x
    x = 1,121,495,864,285.13/867,633.10
  6. Step 6: Final answer
    x = 1,292,592.30

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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.