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Finding the Fourth Proportional to 891,807.60, 1,337,711.40 and 418,540.80

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Solution

The fourth proportional to 891,807.60, 1,337,711.40 and 418,540.80 is: 627,811.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,807.60 : 1,337,711.40 = 418,540.80 : x
  2. Step 2: Convert to fraction form
    891,807.60/1,337,711.40 = 418,540.80/x
  3. Step 3: Cross multiply
    891,807.60x = 1,337,711.40 × 418,540.80
  4. Step 4: Simplify right side
    891,807.60x = 559,886,799,525.12
  5. Step 5: Solve for x
    x = 559,886,799,525.12/891,807.60
  6. Step 6: Final answer
    x = 627,811.20

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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.