Home / 420,456.03-630,776.01-136,175.31

Finding the Fourth Proportional to 420,456.03, 630,776.01 and 136,175.31

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Solution

The fourth proportional to 420,456.03, 630,776.01 and 136,175.31 is: 204,292.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,456.03 : 630,776.01 = 136,175.31 : x
  2. Step 2: Convert to fraction form
    420,456.03/630,776.01 = 136,175.31/x
  3. Step 3: Cross multiply
    420,456.03x = 630,776.01 × 136,175.31
  4. Step 4: Simplify right side
    420,456.03x = 85,896,119,212.97
  5. Step 5: Solve for x
    x = 85,896,119,212.97/420,456.03
  6. Step 6: Final answer
    x = 204,292.75

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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.