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Finding the Fourth Proportional to 658,658.88, 987,974.55 and 209,380.50

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Solution

The fourth proportional to 658,658.88, 987,974.55 and 209,380.50 is: 314,066.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,658.88 : 987,974.55 = 209,380.50 : x
  2. Step 2: Convert to fraction form
    658,658.88/987,974.55 = 209,380.50/x
  3. Step 3: Cross multiply
    658,658.88x = 987,974.55 × 209,380.50
  4. Step 4: Simplify right side
    658,658.88x = 206,862,605,266.28
  5. Step 5: Solve for x
    x = 206,862,605,266.28/658,658.88
  6. Step 6: Final answer
    x = 314,066.37

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1.5x scale

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.