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Finding the Fourth Proportional to 291.52, 437.30 and 257.52

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Solution

The fourth proportional to 291.52, 437.30 and 257.52 is: 386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.52 : 437.30 = 257.52 : x
  2. Step 2: Convert to fraction form
    291.52/437.30 = 257.52/x
  3. Step 3: Cross multiply
    291.52x = 437.30 × 257.52
  4. Step 4: Simplify right side
    291.52x = 112,613.50
  5. Step 5: Solve for x
    x = 112,613.50/291.52
  6. Step 6: Final answer
    x = 386.30

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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.