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Finding the Fourth Proportional to 445.24, 614.48 and 258.76

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Solution

The fourth proportional to 445.24, 614.48 and 258.76 is: 357.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.24 : 614.48 = 258.76 : x
  2. Step 2: Convert to fraction form
    445.24/614.48 = 258.76/x
  3. Step 3: Cross multiply
    445.24x = 614.48 × 258.76
  4. Step 4: Simplify right side
    445.24x = 159,002.84
  5. Step 5: Solve for x
    x = 159,002.84/445.24
  6. Step 6: Final answer
    x = 357.12

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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.