Home / 815,397.12-1,222,172.88-415,192.52

Finding the Fourth Proportional to 815,397.12, 1,222,172.88 and 415,192.52

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Solution

The fourth proportional to 815,397.12, 1,222,172.88 and 415,192.52 is: 622,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,397.12 : 1,222,172.88 = 415,192.52 : x
  2. Step 2: Convert to fraction form
    815,397.12/1,222,172.88 = 415,192.52/x
  3. Step 3: Cross multiply
    815,397.12x = 1,222,172.88 × 415,192.52
  4. Step 4: Simplify right side
    815,397.12x = 507,437,037,922.86
  5. Step 5: Solve for x
    x = 507,437,037,922.86/815,397.12
  6. Step 6: Final answer
    x = 622,318.90

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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.