Home / 438,424.20-657,809.10-172,139.40

Finding the Fourth Proportional to 438,424.20, 657,809.10 and 172,139.40

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Solution

The fourth proportional to 438,424.20, 657,809.10 and 172,139.40 is: 258,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,424.20 : 657,809.10 = 172,139.40 : x
  2. Step 2: Convert to fraction form
    438,424.20/657,809.10 = 172,139.40/x
  3. Step 3: Cross multiply
    438,424.20x = 657,809.10 × 172,139.40
  4. Step 4: Simplify right side
    438,424.20x = 113,234,863,788.54
  5. Step 5: Solve for x
    x = 113,234,863,788.54/438,424.20
  6. Step 6: Final answer
    x = 258,276.95

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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.