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Finding the Fourth Proportional to 616.89, 925.41 and 206.31

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Solution

The fourth proportional to 616.89, 925.41 and 206.31 is: 309.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.89 : 925.41 = 206.31 : x
  2. Step 2: Convert to fraction form
    616.89/925.41 = 206.31/x
  3. Step 3: Cross multiply
    616.89x = 925.41 × 206.31
  4. Step 4: Simplify right side
    616.89x = 190,921.34
  5. Step 5: Solve for x
    x = 190,921.34/616.89
  6. Step 6: Final answer
    x = 309.49

Related Problems

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Half scale
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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.