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Finding the Fourth Proportional to 662,375.61, 914,198.00 and 390,427.83

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Solution

The fourth proportional to 662,375.61, 914,198.00 and 390,427.83 is: 538,860.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,375.61 : 914,198.00 = 390,427.83 : x
  2. Step 2: Convert to fraction form
    662,375.61/914,198.00 = 390,427.83/x
  3. Step 3: Cross multiply
    662,375.61x = 914,198.00 × 390,427.83
  4. Step 4: Simplify right side
    662,375.61x = 356,928,339,378.20
  5. Step 5: Solve for x
    x = 356,928,339,378.20/662,375.61
  6. Step 6: Final answer
    x = 538,860.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.