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Finding the Fourth Proportional to 268.21, 402.35 and 152.75

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Solution

The fourth proportional to 268.21, 402.35 and 152.75 is: 229.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.21 : 402.35 = 152.75 : x
  2. Step 2: Convert to fraction form
    268.21/402.35 = 152.75/x
  3. Step 3: Cross multiply
    268.21x = 402.35 × 152.75
  4. Step 4: Simplify right side
    268.21x = 61,459.01
  5. Step 5: Solve for x
    x = 61,459.01/268.21
  6. Step 6: Final answer
    x = 229.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.