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Finding the Fourth Proportional to 631,608.88, 871,622.52 and 345,128.96

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Solution

The fourth proportional to 631,608.88, 871,622.52 and 345,128.96 is: 476,279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,608.88 : 871,622.52 = 345,128.96 : x
  2. Step 2: Convert to fraction form
    631,608.88/871,622.52 = 345,128.96/x
  3. Step 3: Cross multiply
    631,608.88x = 871,622.52 × 345,128.96
  4. Step 4: Simplify right side
    631,608.88x = 300,822,172,114.53
  5. Step 5: Solve for x
    x = 300,822,172,114.53/631,608.88
  6. Step 6: Final answer
    x = 476,279.20

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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.