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Finding the Fourth Proportional to 876.36, 1,207.46 and 655.24

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Solution

The fourth proportional to 876.36, 1,207.46 and 655.24 is: 902.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.36 : 1,207.46 = 655.24 : x
  2. Step 2: Convert to fraction form
    876.36/1,207.46 = 655.24/x
  3. Step 3: Cross multiply
    876.36x = 1,207.46 × 655.24
  4. Step 4: Simplify right side
    876.36x = 791,176.09
  5. Step 5: Solve for x
    x = 791,176.09/876.36
  6. Step 6: Final answer
    x = 902.80

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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.