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Finding the Fourth Proportional to 631,761.39, 871,817.78 and 345,283.53

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Solution

The fourth proportional to 631,761.39, 871,817.78 and 345,283.53 is: 476,484.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,761.39 : 871,817.78 = 345,283.53 : x
  2. Step 2: Convert to fraction form
    631,761.39/871,817.78 = 345,283.53/x
  3. Step 3: Cross multiply
    631,761.39x = 871,817.78 × 345,283.53
  4. Step 4: Simplify right side
    631,761.39x = 301,024,318,868.75
  5. Step 5: Solve for x
    x = 301,024,318,868.75/631,761.39
  6. Step 6: Final answer
    x = 476,484.20

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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.