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Finding the Fourth Proportional to 465.89, 642.89 and 256.06

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Solution

The fourth proportional to 465.89, 642.89 and 256.06 is: 353.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.89 : 642.89 = 256.06 : x
  2. Step 2: Convert to fraction form
    465.89/642.89 = 256.06/x
  3. Step 3: Cross multiply
    465.89x = 642.89 × 256.06
  4. Step 4: Simplify right side
    465.89x = 164,618.42
  5. Step 5: Solve for x
    x = 164,618.42/465.89
  6. Step 6: Final answer
    x = 353.35

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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.