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Finding the Fourth Proportional to 687,773.60, 1,030,785.60 and 612,540.80

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Solution

The fourth proportional to 687,773.60, 1,030,785.60 and 612,540.80 is: 918,032.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,773.60 : 1,030,785.60 = 612,540.80 : x
  2. Step 2: Convert to fraction form
    687,773.60/1,030,785.60 = 612,540.80/x
  3. Step 3: Cross multiply
    687,773.60x = 1,030,785.60 × 612,540.80
  4. Step 4: Simplify right side
    687,773.60x = 631,398,236,052.48
  5. Step 5: Solve for x
    x = 631,398,236,052.48/687,773.60
  6. Step 6: Final answer
    x = 918,032.09

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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.