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Finding the Fourth Proportional to 425,426.30, 638,139.45 and 410,992.10

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Solution

The fourth proportional to 425,426.30, 638,139.45 and 410,992.10 is: 616,488.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,426.30 : 638,139.45 = 410,992.10 : x
  2. Step 2: Convert to fraction form
    425,426.30/638,139.45 = 410,992.10/x
  3. Step 3: Cross multiply
    425,426.30x = 638,139.45 × 410,992.10
  4. Step 4: Simplify right side
    425,426.30x = 262,270,272,648.35
  5. Step 5: Solve for x
    x = 262,270,272,648.35/425,426.30
  6. Step 6: Final answer
    x = 616,488.15

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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.