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Finding the Fourth Proportional to 2,909.40, 4,013.10 and 1,667.40

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Solution

The fourth proportional to 2,909.40, 4,013.10 and 1,667.40 is: 2,299.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.40 : 4,013.10 = 1,667.40 : x
  2. Step 2: Convert to fraction form
    2,909.40/4,013.10 = 1,667.40/x
  3. Step 3: Cross multiply
    2,909.40x = 4,013.10 × 1,667.40
  4. Step 4: Simplify right side
    2,909.40x = 6,691,442.94
  5. Step 5: Solve for x
    x = 6,691,442.94/2,909.40
  6. Step 6: Final answer
    x = 2,299.94

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1.5x scale

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.