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Finding the Fourth Proportional to 665,561.30, 997,661.55 and 328,082.90

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Solution

The fourth proportional to 665,561.30, 997,661.55 and 328,082.90 is: 491,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,561.30 : 997,661.55 = 328,082.90 : x
  2. Step 2: Convert to fraction form
    665,561.30/997,661.55 = 328,082.90/x
  3. Step 3: Cross multiply
    665,561.30x = 997,661.55 × 328,082.90
  4. Step 4: Simplify right side
    665,561.30x = 327,315,694,542.50
  5. Step 5: Solve for x
    x = 327,315,694,542.50/665,561.30
  6. Step 6: Final answer
    x = 491,788.95

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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.