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Finding the Fourth Proportional to 268.78, 370.76 and 170.50

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Solution

The fourth proportional to 268.78, 370.76 and 170.50 is: 235.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.78 : 370.76 = 170.50 : x
  2. Step 2: Convert to fraction form
    268.78/370.76 = 170.50/x
  3. Step 3: Cross multiply
    268.78x = 370.76 × 170.50
  4. Step 4: Simplify right side
    268.78x = 63,214.58
  5. Step 5: Solve for x
    x = 63,214.58/268.78
  6. Step 6: Final answer
    x = 235.19

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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.