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Finding the Fourth Proportional to 261.76, 390.68 and 244.48

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Solution

The fourth proportional to 261.76, 390.68 and 244.48 is: 364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.76 : 390.68 = 244.48 : x
  2. Step 2: Convert to fraction form
    261.76/390.68 = 244.48/x
  3. Step 3: Cross multiply
    261.76x = 390.68 × 244.48
  4. Step 4: Simplify right side
    261.76x = 95,513.45
  5. Step 5: Solve for x
    x = 95,513.45/261.76
  6. Step 6: Final answer
    x = 364.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.