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Finding the Fourth Proportional to 578.97, 868.47 and 254.34

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Solution

The fourth proportional to 578.97, 868.47 and 254.34 is: 381.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.97 : 868.47 = 254.34 : x
  2. Step 2: Convert to fraction form
    578.97/868.47 = 254.34/x
  3. Step 3: Cross multiply
    578.97x = 868.47 × 254.34
  4. Step 4: Simplify right side
    578.97x = 220,886.66
  5. Step 5: Solve for x
    x = 220,886.66/578.97
  6. Step 6: Final answer
    x = 381.52

Related Problems

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Half scale
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Double scale
Find fourth proportional to 579.97, 869.97 and 255.34
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.