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Finding the Fourth Proportional to 876.55, 1,209.91 and 544.78

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Solution

The fourth proportional to 876.55, 1,209.91 and 544.78 is: 751.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.55 : 1,209.91 = 544.78 : x
  2. Step 2: Convert to fraction form
    876.55/1,209.91 = 544.78/x
  3. Step 3: Cross multiply
    876.55x = 1,209.91 × 544.78
  4. Step 4: Simplify right side
    876.55x = 659,130.67
  5. Step 5: Solve for x
    x = 659,130.67/876.55
  6. Step 6: Final answer
    x = 751.96

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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.