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Finding the Fourth Proportional to 452.76, 624.78 and 256.30

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Solution

The fourth proportional to 452.76, 624.78 and 256.30 is: 353.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.76 : 624.78 = 256.30 : x
  2. Step 2: Convert to fraction form
    452.76/624.78 = 256.30/x
  3. Step 3: Cross multiply
    452.76x = 624.78 × 256.30
  4. Step 4: Simplify right side
    452.76x = 160,131.11
  5. Step 5: Solve for x
    x = 160,131.11/452.76
  6. Step 6: Final answer
    x = 353.68

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Find fourth proportional to 226.38, 312.39 and 128.15
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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.