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Finding the Fourth Proportional to 345.79, 475.56 and 275.02

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Solution

The fourth proportional to 345.79, 475.56 and 275.02 is: 378.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.79 : 475.56 = 275.02 : x
  2. Step 2: Convert to fraction form
    345.79/475.56 = 275.02/x
  3. Step 3: Cross multiply
    345.79x = 475.56 × 275.02
  4. Step 4: Simplify right side
    345.79x = 130,788.68
  5. Step 5: Solve for x
    x = 130,788.68/345.79
  6. Step 6: Final answer
    x = 378.23

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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.