Home / 420,031.22-579,622.04-238,719.20

Finding the Fourth Proportional to 420,031.22, 579,622.04 and 238,719.20

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Solution

The fourth proportional to 420,031.22, 579,622.04 and 238,719.20 is: 329,420.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,031.22 : 579,622.04 = 238,719.20 : x
  2. Step 2: Convert to fraction form
    420,031.22/579,622.04 = 238,719.20/x
  3. Step 3: Cross multiply
    420,031.22x = 579,622.04 × 238,719.20
  4. Step 4: Simplify right side
    420,031.22x = 138,366,909,691.17
  5. Step 5: Solve for x
    x = 138,366,909,691.17/420,031.22
  6. Step 6: Final answer
    x = 329,420.54

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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.