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Finding the Fourth Proportional to 611.05, 916.58 and 178.20

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Solution

The fourth proportional to 611.05, 916.58 and 178.20 is: 267.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.05 : 916.58 = 178.20 : x
  2. Step 2: Convert to fraction form
    611.05/916.58 = 178.20/x
  3. Step 3: Cross multiply
    611.05x = 916.58 × 178.20
  4. Step 4: Simplify right side
    611.05x = 163,334.56
  5. Step 5: Solve for x
    x = 163,334.56/611.05
  6. Step 6: Final answer
    x = 267.30

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.