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Finding the Fourth Proportional to 866.12, 1,195.38 and 493.10

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Solution

The fourth proportional to 866.12, 1,195.38 and 493.10 is: 680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.12 : 1,195.38 = 493.10 : x
  2. Step 2: Convert to fraction form
    866.12/1,195.38 = 493.10/x
  3. Step 3: Cross multiply
    866.12x = 1,195.38 × 493.10
  4. Step 4: Simplify right side
    866.12x = 589,441.88
  5. Step 5: Solve for x
    x = 589,441.88/866.12
  6. Step 6: Final answer
    x = 680.55

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.