Home / 420,536.38-630,774.06-164,320.78

Finding the Fourth Proportional to 420,536.38, 630,774.06 and 164,320.78

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Solution

The fourth proportional to 420,536.38, 630,774.06 and 164,320.78 is: 246,469.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,536.38 : 630,774.06 = 164,320.78 : x
  2. Step 2: Convert to fraction form
    420,536.38/630,774.06 = 164,320.78/x
  3. Step 3: Cross multiply
    420,536.38x = 630,774.06 × 164,320.78
  4. Step 4: Simplify right side
    420,536.38x = 103,649,287,119.90
  5. Step 5: Solve for x
    x = 103,649,287,119.90/420,536.38
  6. Step 6: Final answer
    x = 246,469.25

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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.