Home / 438,422.20-657,806.10-172,137.40

Finding the Fourth Proportional to 438,422.20, 657,806.10 and 172,137.40

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Solution

The fourth proportional to 438,422.20, 657,806.10 and 172,137.40 is: 258,273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,422.20 : 657,806.10 = 172,137.40 : x
  2. Step 2: Convert to fraction form
    438,422.20/657,806.10 = 172,137.40/x
  3. Step 3: Cross multiply
    438,422.20x = 657,806.10 × 172,137.40
  4. Step 4: Simplify right side
    438,422.20x = 113,233,031,758.14
  5. Step 5: Solve for x
    x = 113,233,031,758.14/438,422.20
  6. Step 6: Final answer
    x = 258,273.95

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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.