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Finding the Fourth Proportional to 631,387.98, 871,318.44 and 344,912.76

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Solution

The fourth proportional to 631,387.98, 871,318.44 and 344,912.76 is: 475,981.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,387.98 : 871,318.44 = 344,912.76 : x
  2. Step 2: Convert to fraction form
    631,387.98/871,318.44 = 344,912.76/x
  3. Step 3: Cross multiply
    631,387.98x = 871,318.44 × 344,912.76
  4. Step 4: Simplify right side
    631,387.98x = 300,528,847,979.29
  5. Step 5: Solve for x
    x = 300,528,847,979.29/631,387.98
  6. Step 6: Final answer
    x = 475,981.26

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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.