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Finding the Fourth Proportional to 611.10, 916.60 and 178.26

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Solution

The fourth proportional to 611.10, 916.60 and 178.26 is: 267.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.10 : 916.60 = 178.26 : x
  2. Step 2: Convert to fraction form
    611.10/916.60 = 178.26/x
  3. Step 3: Cross multiply
    611.10x = 916.60 × 178.26
  4. Step 4: Simplify right side
    611.10x = 163,393.12
  5. Step 5: Solve for x
    x = 163,393.12/611.10
  6. Step 6: Final answer
    x = 267.38

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Double scale
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1.5x scale

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.