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Finding the Fourth Proportional to 631,691.06, 871,734.05 and 345,211.14

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Solution

The fourth proportional to 631,691.06, 871,734.05 and 345,211.14 is: 476,391.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,691.06 : 871,734.05 = 345,211.14 : x
  2. Step 2: Convert to fraction form
    631,691.06/871,734.05 = 345,211.14/x
  3. Step 3: Cross multiply
    631,691.06x = 871,734.05 × 345,211.14
  4. Step 4: Simplify right side
    631,691.06x = 300,932,305,177.32
  5. Step 5: Solve for x
    x = 300,932,305,177.32/631,691.06
  6. Step 6: Final answer
    x = 476,391.58

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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.