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Finding the Fourth Proportional to 268.49, 370.46 and 154.91

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Solution

The fourth proportional to 268.49, 370.46 and 154.91 is: 213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.49 : 370.46 = 154.91 : x
  2. Step 2: Convert to fraction form
    268.49/370.46 = 154.91/x
  3. Step 3: Cross multiply
    268.49x = 370.46 × 154.91
  4. Step 4: Simplify right side
    268.49x = 57,389.27
  5. Step 5: Solve for x
    x = 57,389.27/268.49
  6. Step 6: Final answer
    x = 213.75

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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.