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Finding the Fourth Proportional to 815,432.80, 1,223,149.20 and 807,559.60

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Solution

The fourth proportional to 815,432.80, 1,223,149.20 and 807,559.60 is: 1,211,339.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,432.80 : 1,223,149.20 = 807,559.60 : x
  2. Step 2: Convert to fraction form
    815,432.80/1,223,149.20 = 807,559.60/x
  3. Step 3: Cross multiply
    815,432.80x = 1,223,149.20 × 807,559.60
  4. Step 4: Simplify right side
    815,432.80x = 987,765,878,692.32
  5. Step 5: Solve for x
    x = 987,765,878,692.32/815,432.80
  6. Step 6: Final answer
    x = 1,211,339.40

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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.