Home / 391,278.09-586,746.23-138,474.56

Finding the Fourth Proportional to 391,278.09, 586,746.23 and 138,474.56

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Solution

The fourth proportional to 391,278.09, 586,746.23 and 138,474.56 is: 207,651.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,278.09 : 586,746.23 = 138,474.56 : x
  2. Step 2: Convert to fraction form
    391,278.09/586,746.23 = 138,474.56/x
  3. Step 3: Cross multiply
    391,278.09x = 586,746.23 × 138,474.56
  4. Step 4: Simplify right side
    391,278.09x = 81,249,427,584.32
  5. Step 5: Solve for x
    x = 81,249,427,584.32/391,278.09
  6. Step 6: Final answer
    x = 207,651.36

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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.