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Finding the Fourth Proportional to 431.38, 595.26 and 256.69

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Solution

The fourth proportional to 431.38, 595.26 and 256.69 is: 354.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.38 : 595.26 = 256.69 : x
  2. Step 2: Convert to fraction form
    431.38/595.26 = 256.69/x
  3. Step 3: Cross multiply
    431.38x = 595.26 × 256.69
  4. Step 4: Simplify right side
    431.38x = 152,797.29
  5. Step 5: Solve for x
    x = 152,797.29/431.38
  6. Step 6: Final answer
    x = 354.21

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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.