Home / 420,830.33-631,334.25-136,498.79

Finding the Fourth Proportional to 420,830.33, 631,334.25 and 136,498.79

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Solution

The fourth proportional to 420,830.33, 631,334.25 and 136,498.79 is: 204,776.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,830.33 : 631,334.25 = 136,498.79 : x
  2. Step 2: Convert to fraction form
    420,830.33/631,334.25 = 136,498.79/x
  3. Step 3: Cross multiply
    420,830.33x = 631,334.25 × 136,498.79
  4. Step 4: Simplify right side
    420,830.33x = 86,176,358,053.89
  5. Step 5: Solve for x
    x = 86,176,358,053.89/420,830.33
  6. Step 6: Final answer
    x = 204,776.97

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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.