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Finding the Fourth Proportional to 431.51, 595.49 and 256.82

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Solution

The fourth proportional to 431.51, 595.49 and 256.82 is: 354.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.51 : 595.49 = 256.82 : x
  2. Step 2: Convert to fraction form
    431.51/595.49 = 256.82/x
  3. Step 3: Cross multiply
    431.51x = 595.49 × 256.82
  4. Step 4: Simplify right side
    431.51x = 152,929.48
  5. Step 5: Solve for x
    x = 152,929.48/431.51
  6. Step 6: Final answer
    x = 354.41

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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.