Home / 378,690.19-522,623.66-215,397.83

Finding the Fourth Proportional to 378,690.19, 522,623.66 and 215,397.83

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Solution

The fourth proportional to 378,690.19, 522,623.66 and 215,397.83 is: 297,266.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,690.19 : 522,623.66 = 215,397.83 : x
  2. Step 2: Convert to fraction form
    378,690.19/522,623.66 = 215,397.83/x
  3. Step 3: Cross multiply
    378,690.19x = 522,623.66 × 215,397.83
  4. Step 4: Simplify right side
    378,690.19x = 112,572,002,500.23
  5. Step 5: Solve for x
    x = 112,572,002,500.23/378,690.19
  6. Step 6: Final answer
    x = 297,266.75

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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.