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Finding the Fourth Proportional to 420,920.20, 630,964.68 and 168,048.36

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Solution

The fourth proportional to 420,920.20, 630,964.68 and 168,048.36 is: 251,906.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,920.20 : 630,964.68 = 168,048.36 : x
  2. Step 2: Convert to fraction form
    420,920.20/630,964.68 = 168,048.36/x
  3. Step 3: Cross multiply
    420,920.20x = 630,964.68 × 168,048.36
  4. Step 4: Simplify right side
    420,920.20x = 106,032,579,691.93
  5. Step 5: Solve for x
    x = 106,032,579,691.93/420,920.20
  6. Step 6: Final answer
    x = 251,906.61

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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.