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Finding the Fourth Proportional to 261.81, 393.30 and 184.95

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Solution

The fourth proportional to 261.81, 393.30 and 184.95 is: 277.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.81 : 393.30 = 184.95 : x
  2. Step 2: Convert to fraction form
    261.81/393.30 = 184.95/x
  3. Step 3: Cross multiply
    261.81x = 393.30 × 184.95
  4. Step 4: Simplify right side
    261.81x = 72,740.84
  5. Step 5: Solve for x
    x = 72,740.84/261.81
  6. Step 6: Final answer
    x = 277.84

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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.