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Finding the Fourth Proportional to 356.18, 491.49 and 258.02

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Solution

The fourth proportional to 356.18, 491.49 and 258.02 is: 356.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.18 : 491.49 = 258.02 : x
  2. Step 2: Convert to fraction form
    356.18/491.49 = 258.02/x
  3. Step 3: Cross multiply
    356.18x = 491.49 × 258.02
  4. Step 4: Simplify right side
    356.18x = 126,814.25
  5. Step 5: Solve for x
    x = 126,814.25/356.18
  6. Step 6: Final answer
    x = 356.04

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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.