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Finding the Fourth Proportional to 681,655.81, 940,339.31 and 520,230.60

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Solution

The fourth proportional to 681,655.81, 940,339.31 and 520,230.60 is: 717,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,655.81 : 940,339.31 = 520,230.60 : x
  2. Step 2: Convert to fraction form
    681,655.81/940,339.31 = 520,230.60/x
  3. Step 3: Cross multiply
    681,655.81x = 940,339.31 × 520,230.60
  4. Step 4: Simplify right side
    681,655.81x = 489,193,286,414.73
  5. Step 5: Solve for x
    x = 489,193,286,414.73/681,655.81
  6. Step 6: Final answer
    x = 717,654.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.