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Finding the Fourth Proportional to 578.76, 868.02 and 188.76

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Solution

The fourth proportional to 578.76, 868.02 and 188.76 is: 283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.76 : 868.02 = 188.76 : x
  2. Step 2: Convert to fraction form
    578.76/868.02 = 188.76/x
  3. Step 3: Cross multiply
    578.76x = 868.02 × 188.76
  4. Step 4: Simplify right side
    578.76x = 163,847.46
  5. Step 5: Solve for x
    x = 163,847.46/578.76
  6. Step 6: Final answer
    x = 283.10

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Double scale
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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.