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Finding the Fourth Proportional to 268.07, 369.95 and 156.05

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Solution

The fourth proportional to 268.07, 369.95 and 156.05 is: 215.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.07 : 369.95 = 156.05 : x
  2. Step 2: Convert to fraction form
    268.07/369.95 = 156.05/x
  3. Step 3: Cross multiply
    268.07x = 369.95 × 156.05
  4. Step 4: Simplify right side
    268.07x = 57,730.70
  5. Step 5: Solve for x
    x = 57,730.70/268.07
  6. Step 6: Final answer
    x = 215.36

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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.