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Finding the Fourth Proportional to 665,560.30, 997,660.05 and 328,081.90

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Solution

The fourth proportional to 665,560.30, 997,660.05 and 328,081.90 is: 491,787.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,560.30 : 997,660.05 = 328,081.90 : x
  2. Step 2: Convert to fraction form
    665,560.30/997,660.05 = 328,081.90/x
  3. Step 3: Cross multiply
    665,560.30x = 997,660.05 × 328,081.90
  4. Step 4: Simplify right side
    665,560.30x = 327,314,204,758.10
  5. Step 5: Solve for x
    x = 327,314,204,758.10/665,560.30
  6. Step 6: Final answer
    x = 491,787.45

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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.