Home / 390,331.31-538,650.20-220,561.79

Finding the Fourth Proportional to 390,331.31, 538,650.20 and 220,561.79

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Solution

The fourth proportional to 390,331.31, 538,650.20 and 220,561.79 is: 304,371.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,331.31 : 538,650.20 = 220,561.79 : x
  2. Step 2: Convert to fraction form
    390,331.31/538,650.20 = 220,561.79/x
  3. Step 3: Cross multiply
    390,331.31x = 538,650.20 × 220,561.79
  4. Step 4: Simplify right side
    390,331.31x = 118,805,650,154.01
  5. Step 5: Solve for x
    x = 118,805,650,154.01/390,331.31
  6. Step 6: Final answer
    x = 304,371.31

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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.