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Finding the Fourth Proportional to 875,114.40, 1,312,963.20 and 781,046.40

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Solution

The fourth proportional to 875,114.40, 1,312,963.20 and 781,046.40 is: 1,171,829.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,114.40 : 1,312,963.20 = 781,046.40 : x
  2. Step 2: Convert to fraction form
    875,114.40/1,312,963.20 = 781,046.40/x
  3. Step 3: Cross multiply
    875,114.40x = 1,312,963.20 × 781,046.40
  4. Step 4: Simplify right side
    875,114.40x = 1,025,485,180,692.48
  5. Step 5: Solve for x
    x = 1,025,485,180,692.48/875,114.40
  6. Step 6: Final answer
    x = 1,171,829.86

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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.