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Finding the Fourth Proportional to 631,650.40, 871,675.77 and 345,172.30

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Solution

The fourth proportional to 631,650.40, 871,675.77 and 345,172.30 is: 476,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,650.40 : 871,675.77 = 345,172.30 : x
  2. Step 2: Convert to fraction form
    631,650.40/871,675.77 = 345,172.30/x
  3. Step 3: Cross multiply
    631,650.40x = 871,675.77 × 345,172.30
  4. Step 4: Simplify right side
    631,650.40x = 300,878,330,385.17
  5. Step 5: Solve for x
    x = 300,878,330,385.17/631,650.40
  6. Step 6: Final answer
    x = 476,336.80

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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.