Home / 763,400.80-1,144,179.60-389,231.20

Finding the Fourth Proportional to 763,400.80, 1,144,179.60 and 389,231.20

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Solution

The fourth proportional to 763,400.80, 1,144,179.60 and 389,231.20 is: 583,376.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,400.80 : 1,144,179.60 = 389,231.20 : x
  2. Step 2: Convert to fraction form
    763,400.80/1,144,179.60 = 389,231.20/x
  3. Step 3: Cross multiply
    763,400.80x = 1,144,179.60 × 389,231.20
  4. Step 4: Simplify right side
    763,400.80x = 445,350,398,723.52
  5. Step 5: Solve for x
    x = 445,350,398,723.52/763,400.80
  6. Step 6: Final answer
    x = 583,376.91

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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.