Home / 665,523.90-918,092.37-393,459.30

Finding the Fourth Proportional to 665,523.90, 918,092.37 and 393,459.30

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Solution

The fourth proportional to 665,523.90, 918,092.37 and 393,459.30 is: 542,778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,523.90 : 918,092.37 = 393,459.30 : x
  2. Step 2: Convert to fraction form
    665,523.90/918,092.37 = 393,459.30/x
  3. Step 3: Cross multiply
    665,523.90x = 918,092.37 × 393,459.30
  4. Step 4: Simplify right side
    665,523.90x = 361,231,981,235.54
  5. Step 5: Solve for x
    x = 361,231,981,235.54/665,523.90
  6. Step 6: Final answer
    x = 542,778.38

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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.