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Finding the Fourth Proportional to 660,575.71, 990,610.03 and 281,255.95

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Solution

The fourth proportional to 660,575.71, 990,610.03 and 281,255.95 is: 421,775.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,575.71 : 990,610.03 = 281,255.95 : x
  2. Step 2: Convert to fraction form
    660,575.71/990,610.03 = 281,255.95/x
  3. Step 3: Cross multiply
    660,575.71x = 990,610.03 × 281,255.95
  4. Step 4: Simplify right side
    660,575.71x = 278,614,965,067.18
  5. Step 5: Solve for x
    x = 278,614,965,067.18/660,575.71
  6. Step 6: Final answer
    x = 421,775.98

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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.