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Finding the Fourth Proportional to 631,863.88, 871,972.09 and 345,385.11

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Solution

The fourth proportional to 631,863.88, 871,972.09 and 345,385.11 is: 476,631.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,863.88 : 871,972.09 = 345,385.11 : x
  2. Step 2: Convert to fraction form
    631,863.88/871,972.09 = 345,385.11/x
  3. Step 3: Cross multiply
    631,863.88x = 871,972.09 × 345,385.11
  4. Step 4: Simplify right side
    631,863.88x = 301,166,176,221.58
  5. Step 5: Solve for x
    x = 301,166,176,221.58/631,863.88
  6. Step 6: Final answer
    x = 476,631.42

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.