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Finding the Fourth Proportional to 1,207.62, 1,667.12 and 855.27

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Solution

The fourth proportional to 1,207.62, 1,667.12 and 855.27 is: 1,180.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.62 : 1,667.12 = 855.27 : x
  2. Step 2: Convert to fraction form
    1,207.62/1,667.12 = 855.27/x
  3. Step 3: Cross multiply
    1,207.62x = 1,667.12 × 855.27
  4. Step 4: Simplify right side
    1,207.62x = 1,425,833.45
  5. Step 5: Solve for x
    x = 1,425,833.45/1,207.62
  6. Step 6: Final answer
    x = 1,180.70

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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.