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Finding the Fourth Proportional to 610.80, 916.15 and 200.21

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Solution

The fourth proportional to 610.80, 916.15 and 200.21 is: 300.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.80 : 916.15 = 200.21 : x
  2. Step 2: Convert to fraction form
    610.80/916.15 = 200.21/x
  3. Step 3: Cross multiply
    610.80x = 916.15 × 200.21
  4. Step 4: Simplify right side
    610.80x = 183,421.27
  5. Step 5: Solve for x
    x = 183,421.27/610.80
  6. Step 6: Final answer
    x = 300.30

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Double scale
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Similar ratio
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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.