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Finding the Fourth Proportional to 631,755.27, 871,820.19 and 345,275.28

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Solution

The fourth proportional to 631,755.27, 871,820.19 and 345,275.28 is: 476,478.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,755.27 : 871,820.19 = 345,275.28 : x
  2. Step 2: Convert to fraction form
    631,755.27/871,820.19 = 345,275.28/x
  3. Step 3: Cross multiply
    631,755.27x = 871,820.19 × 345,275.28
  4. Step 4: Simplify right side
    631,755.27x = 301,017,960,211.90
  5. Step 5: Solve for x
    x = 301,017,960,211.90/631,755.27
  6. Step 6: Final answer
    x = 476,478.75

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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.