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Finding the Fourth Proportional to 662,147.74, 913,793.97 and 390,227.11

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Solution

The fourth proportional to 662,147.74, 913,793.97 and 390,227.11 is: 538,531.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,147.74 : 913,793.97 = 390,227.11 : x
  2. Step 2: Convert to fraction form
    662,147.74/913,793.97 = 390,227.11/x
  3. Step 3: Cross multiply
    662,147.74x = 913,793.97 × 390,227.11
  4. Step 4: Simplify right side
    662,147.74x = 356,587,180,048.53
  5. Step 5: Solve for x
    x = 356,587,180,048.53/662,147.74
  6. Step 6: Final answer
    x = 538,531.14

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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.