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Finding the Fourth Proportional to 1,584.88, 2,187.08 and 876.72

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Solution

The fourth proportional to 1,584.88, 2,187.08 and 876.72 is: 1,209.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,584.88 : 2,187.08 = 876.72 : x
  2. Step 2: Convert to fraction form
    1,584.88/2,187.08 = 876.72/x
  3. Step 3: Cross multiply
    1,584.88x = 2,187.08 × 876.72
  4. Step 4: Simplify right side
    1,584.88x = 1,917,456.78
  5. Step 5: Solve for x
    x = 1,917,456.78/1,584.88
  6. Step 6: Final answer
    x = 1,209.84

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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.