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Finding the Fourth Proportional to 491,695.60, 736,765.80 and 412,380.40

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Solution

The fourth proportional to 491,695.60, 736,765.80 and 412,380.40 is: 617,918.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,695.60 : 736,765.80 = 412,380.40 : x
  2. Step 2: Convert to fraction form
    491,695.60/736,765.80 = 412,380.40/x
  3. Step 3: Cross multiply
    491,695.60x = 736,765.80 × 412,380.40
  4. Step 4: Simplify right side
    491,695.60x = 303,827,775,310.32
  5. Step 5: Solve for x
    x = 303,827,775,310.32/491,695.60
  6. Step 6: Final answer
    x = 617,918.43

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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.