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Finding the Fourth Proportional to 240.57, 358.83 and 215.19

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Solution

The fourth proportional to 240.57, 358.83 and 215.19 is: 320.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.57 : 358.83 = 215.19 : x
  2. Step 2: Convert to fraction form
    240.57/358.83 = 215.19/x
  3. Step 3: Cross multiply
    240.57x = 358.83 × 215.19
  4. Step 4: Simplify right side
    240.57x = 77,216.63
  5. Step 5: Solve for x
    x = 77,216.63/240.57
  6. Step 6: Final answer
    x = 320.97

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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.