Home / 378,971.40-522,990.05-215,618.91

Finding the Fourth Proportional to 378,971.40, 522,990.05 and 215,618.91

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Solution

The fourth proportional to 378,971.40, 522,990.05 and 215,618.91 is: 297,559.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,971.40 : 522,990.05 = 215,618.91 : x
  2. Step 2: Convert to fraction form
    378,971.40/522,990.05 = 215,618.91/x
  3. Step 3: Cross multiply
    378,971.40x = 522,990.05 × 215,618.91
  4. Step 4: Simplify right side
    378,971.40x = 112,766,543,443.75
  5. Step 5: Solve for x
    x = 112,766,543,443.75/378,971.40
  6. Step 6: Final answer
    x = 297,559.51

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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.