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Finding the Fourth Proportional to 261.51, 392.30 and 96.96

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Solution

The fourth proportional to 261.51, 392.30 and 96.96 is: 145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.51 : 392.30 = 96.96 : x
  2. Step 2: Convert to fraction form
    261.51/392.30 = 96.96/x
  3. Step 3: Cross multiply
    261.51x = 392.30 × 96.96
  4. Step 4: Simplify right side
    261.51x = 38,037.41
  5. Step 5: Solve for x
    x = 38,037.41/261.51
  6. Step 6: Final answer
    x = 145.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.