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Finding the Fourth Proportional to 578.49, 867.78 and 188.39

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Solution

The fourth proportional to 578.49, 867.78 and 188.39 is: 282.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.49 : 867.78 = 188.39 : x
  2. Step 2: Convert to fraction form
    578.49/867.78 = 188.39/x
  3. Step 3: Cross multiply
    578.49x = 867.78 × 188.39
  4. Step 4: Simplify right side
    578.49x = 163,476.74
  5. Step 5: Solve for x
    x = 163,476.74/578.49
  6. Step 6: Final answer
    x = 282.59

Related Problems

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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.