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Finding the Fourth Proportional to 267,886.40, 401,138.40 and 212,590.40

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Solution

The fourth proportional to 267,886.40, 401,138.40 and 212,590.40 is: 318,337.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,886.40 : 401,138.40 = 212,590.40 : x
  2. Step 2: Convert to fraction form
    267,886.40/401,138.40 = 212,590.40/x
  3. Step 3: Cross multiply
    267,886.40x = 401,138.40 × 212,590.40
  4. Step 4: Simplify right side
    267,886.40x = 85,278,172,911.36
  5. Step 5: Solve for x
    x = 85,278,172,911.36/267,886.40
  6. Step 6: Final answer
    x = 318,337.07

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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.