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Finding the Fourth Proportional to 264.30, 398.45 and 248.64

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Solution

The fourth proportional to 264.30, 398.45 and 248.64 is: 374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.30 : 398.45 = 248.64 : x
  2. Step 2: Convert to fraction form
    264.30/398.45 = 248.64/x
  3. Step 3: Cross multiply
    264.30x = 398.45 × 248.64
  4. Step 4: Simplify right side
    264.30x = 99,070.61
  5. Step 5: Solve for x
    x = 99,070.61/264.30
  6. Step 6: Final answer
    x = 374.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.