Home / 396,427.28-547,070-215,139.24

Finding the Fourth Proportional to 396,427.28, 547,070 and 215,139.24

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Solution

The fourth proportional to 396,427.28, 547,070 and 215,139.24 is: 296,892.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,427.28 : 547,070 = 215,139.24 : x
  2. Step 2: Convert to fraction form
    396,427.28/547,070 = 215,139.24/x
  3. Step 3: Cross multiply
    396,427.28x = 547,070 × 215,139.24
  4. Step 4: Simplify right side
    396,427.28x = 117,696,224,026.80
  5. Step 5: Solve for x
    x = 117,696,224,026.80/396,427.28
  6. Step 6: Final answer
    x = 296,892.34

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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.