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Finding the Fourth Proportional to 666,014.31, 998,855.15 and 261,289

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Solution

The fourth proportional to 666,014.31, 998,855.15 and 261,289 is: 391,868.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,014.31 : 998,855.15 = 261,289 : x
  2. Step 2: Convert to fraction form
    666,014.31/998,855.15 = 261,289/x
  3. Step 3: Cross multiply
    666,014.31x = 998,855.15 × 261,289
  4. Step 4: Simplify right side
    666,014.31x = 260,989,861,981.91
  5. Step 5: Solve for x
    x = 260,989,861,981.91/666,014.31
  6. Step 6: Final answer
    x = 391,868.25

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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.