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Finding the Fourth Proportional to 861,710.40, 1,292,047.20 and 441,806.40

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Solution

The fourth proportional to 861,710.40, 1,292,047.20 and 441,806.40 is: 662,443.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,710.40 : 1,292,047.20 = 441,806.40 : x
  2. Step 2: Convert to fraction form
    861,710.40/1,292,047.20 = 441,806.40/x
  3. Step 3: Cross multiply
    861,710.40x = 1,292,047.20 × 441,806.40
  4. Step 4: Simplify right side
    861,710.40x = 570,834,722,062.08
  5. Step 5: Solve for x
    x = 570,834,722,062.08/861,710.40
  6. Step 6: Final answer
    x = 662,443.81

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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.