Home / 390,882.31-539,473.97-225,278.06

Finding the Fourth Proportional to 390,882.31, 539,473.97 and 225,278.06

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Solution

The fourth proportional to 390,882.31, 539,473.97 and 225,278.06 is: 310,916.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,882.31 : 539,473.97 = 225,278.06 : x
  2. Step 2: Convert to fraction form
    390,882.31/539,473.97 = 225,278.06/x
  3. Step 3: Cross multiply
    390,882.31x = 539,473.97 × 225,278.06
  4. Step 4: Simplify right side
    390,882.31x = 121,531,649,382.10
  5. Step 5: Solve for x
    x = 121,531,649,382.10/390,882.31
  6. Step 6: Final answer
    x = 310,916.22

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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.