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Finding the Fourth Proportional to 631,633.20, 871,656 and 345,153.30

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Solution

The fourth proportional to 631,633.20, 871,656 and 345,153.30 is: 476,312.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,633.20 : 871,656 = 345,153.30 : x
  2. Step 2: Convert to fraction form
    631,633.20/871,656 = 345,153.30/x
  3. Step 3: Cross multiply
    631,633.20x = 871,656 × 345,153.30
  4. Step 4: Simplify right side
    631,633.20x = 300,854,944,864.80
  5. Step 5: Solve for x
    x = 300,854,944,864.80/631,633.20
  6. Step 6: Final answer
    x = 476,312.75

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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.