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Finding the Fourth Proportional to 631,718.50, 871,813.56 and 356,144.32

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Solution

The fourth proportional to 631,718.50, 871,813.56 and 356,144.32 is: 491,502.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,718.50 : 871,813.56 = 356,144.32 : x
  2. Step 2: Convert to fraction form
    631,718.50/871,813.56 = 356,144.32/x
  3. Step 3: Cross multiply
    631,718.50x = 871,813.56 × 356,144.32
  4. Step 4: Simplify right side
    631,718.50x = 310,491,447,492.98
  5. Step 5: Solve for x
    x = 310,491,447,492.98/631,718.50
  6. Step 6: Final answer
    x = 491,502.86

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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.