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Finding the Fourth Proportional to 907,616.80, 1,361,425.20 and 781,645.60

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Solution

The fourth proportional to 907,616.80, 1,361,425.20 and 781,645.60 is: 1,172,468.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,616.80 : 1,361,425.20 = 781,645.60 : x
  2. Step 2: Convert to fraction form
    907,616.80/1,361,425.20 = 781,645.60/x
  3. Step 3: Cross multiply
    907,616.80x = 1,361,425.20 × 781,645.60
  4. Step 4: Simplify right side
    907,616.80x = 1,064,152,017,309.12
  5. Step 5: Solve for x
    x = 1,064,152,017,309.12/907,616.80
  6. Step 6: Final answer
    x = 1,172,468.40

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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.