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Finding the Fourth Proportional to 314.79, 433.48 and 270.20

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Solution

The fourth proportional to 314.79, 433.48 and 270.20 is: 372.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.79 : 433.48 = 270.20 : x
  2. Step 2: Convert to fraction form
    314.79/433.48 = 270.20/x
  3. Step 3: Cross multiply
    314.79x = 433.48 × 270.20
  4. Step 4: Simplify right side
    314.79x = 117,126.30
  5. Step 5: Solve for x
    x = 117,126.30/314.79
  6. Step 6: Final answer
    x = 372.08

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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.