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Finding the Fourth Proportional to 357.28, 493.48 and 258.88

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Solution

The fourth proportional to 357.28, 493.48 and 258.88 is: 357.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.28 : 493.48 = 258.88 : x
  2. Step 2: Convert to fraction form
    357.28/493.48 = 258.88/x
  3. Step 3: Cross multiply
    357.28x = 493.48 × 258.88
  4. Step 4: Simplify right side
    357.28x = 127,752.10
  5. Step 5: Solve for x
    x = 127,752.10/357.28
  6. Step 6: Final answer
    x = 357.57

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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.