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Finding the Fourth Proportional to 865.39, 1,298.08 and 249.10

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Solution

The fourth proportional to 865.39, 1,298.08 and 249.10 is: 373.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.39 : 1,298.08 = 249.10 : x
  2. Step 2: Convert to fraction form
    865.39/1,298.08 = 249.10/x
  3. Step 3: Cross multiply
    865.39x = 1,298.08 × 249.10
  4. Step 4: Simplify right side
    865.39x = 323,351.73
  5. Step 5: Solve for x
    x = 323,351.73/865.39
  6. Step 6: Final answer
    x = 373.65

Related Problems

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Half scale
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Double scale
Find fourth proportional to 866.39, 1,299.58 and 250.10
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.