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Finding the Fourth Proportional to 662,351.11, 914,163.82 and 390,403.13

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Solution

The fourth proportional to 662,351.11, 914,163.82 and 390,403.13 is: 538,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,351.11 : 914,163.82 = 390,403.13 : x
  2. Step 2: Convert to fraction form
    662,351.11/914,163.82 = 390,403.13/x
  3. Step 3: Cross multiply
    662,351.11x = 914,163.82 × 390,403.13
  4. Step 4: Simplify right side
    662,351.11x = 356,892,414,542.04
  5. Step 5: Solve for x
    x = 356,892,414,542.04/662,351.11
  6. Step 6: Final answer
    x = 538,826.63

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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.