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Finding the Fourth Proportional to 578.57, 867.78 and 145.69

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Solution

The fourth proportional to 578.57, 867.78 and 145.69 is: 218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.57 : 867.78 = 145.69 : x
  2. Step 2: Convert to fraction form
    578.57/867.78 = 145.69/x
  3. Step 3: Cross multiply
    578.57x = 867.78 × 145.69
  4. Step 4: Simplify right side
    578.57x = 126,424.70
  5. Step 5: Solve for x
    x = 126,424.70/578.57
  6. Step 6: Final answer
    x = 218.51

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.