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Finding the Fourth Proportional to 387.53, 531.98 and 383.88

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Solution

The fourth proportional to 387.53, 531.98 and 383.88 is: 526.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.53 : 531.98 = 383.88 : x
  2. Step 2: Convert to fraction form
    387.53/531.98 = 383.88/x
  3. Step 3: Cross multiply
    387.53x = 531.98 × 383.88
  4. Step 4: Simplify right side
    387.53x = 204,217.44
  5. Step 5: Solve for x
    x = 204,217.44/387.53
  6. Step 6: Final answer
    x = 526.98

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.