Home / 820,170.30-1,230,255.45-687,459.90

Finding the Fourth Proportional to 820,170.30, 1,230,255.45 and 687,459.90

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Solution

The fourth proportional to 820,170.30, 1,230,255.45 and 687,459.90 is: 1,031,189.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,170.30 : 1,230,255.45 = 687,459.90 : x
  2. Step 2: Convert to fraction form
    820,170.30/1,230,255.45 = 687,459.90/x
  3. Step 3: Cross multiply
    820,170.30x = 1,230,255.45 × 687,459.90
  4. Step 4: Simplify right side
    820,170.30x = 845,751,288,631.46
  5. Step 5: Solve for x
    x = 845,751,288,631.46/820,170.30
  6. Step 6: Final answer
    x = 1,031,189.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.