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Finding the Fourth Proportional to 378,832.59, 522,801.18 and 215,484.87

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Solution

The fourth proportional to 378,832.59, 522,801.18 and 215,484.87 is: 297,376.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,832.59 : 522,801.18 = 215,484.87 : x
  2. Step 2: Convert to fraction form
    378,832.59/522,801.18 = 215,484.87/x
  3. Step 3: Cross multiply
    378,832.59x = 522,801.18 × 215,484.87
  4. Step 4: Simplify right side
    378,832.59x = 112,655,744,308.15
  5. Step 5: Solve for x
    x = 112,655,744,308.15/378,832.59
  6. Step 6: Final answer
    x = 297,376.06

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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.