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Finding the Fourth Proportional to 431.24, 594.78 and 256.55

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Solution

The fourth proportional to 431.24, 594.78 and 256.55 is: 353.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.24 : 594.78 = 256.55 : x
  2. Step 2: Convert to fraction form
    431.24/594.78 = 256.55/x
  3. Step 3: Cross multiply
    431.24x = 594.78 × 256.55
  4. Step 4: Simplify right side
    431.24x = 152,590.81
  5. Step 5: Solve for x
    x = 152,590.81/431.24
  6. Step 6: Final answer
    x = 353.84

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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.