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Finding the Fourth Proportional to 425,418.11, 638,124.86 and 245,386.85

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Solution

The fourth proportional to 425,418.11, 638,124.86 and 245,386.85 is: 368,078.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,418.11 : 638,124.86 = 245,386.85 : x
  2. Step 2: Convert to fraction form
    425,418.11/638,124.86 = 245,386.85/x
  3. Step 3: Cross multiply
    425,418.11x = 638,124.86 × 245,386.85
  4. Step 4: Simplify right side
    425,418.11x = 156,587,446,111.47
  5. Step 5: Solve for x
    x = 156,587,446,111.47/425,418.11
  6. Step 6: Final answer
    x = 368,078.94

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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.