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Finding the Fourth Proportional to 342.28, 511.34 and 340.48

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Solution

The fourth proportional to 342.28, 511.34 and 340.48 is: 508.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.28 : 511.34 = 340.48 : x
  2. Step 2: Convert to fraction form
    342.28/511.34 = 340.48/x
  3. Step 3: Cross multiply
    342.28x = 511.34 × 340.48
  4. Step 4: Simplify right side
    342.28x = 174,101.04
  5. Step 5: Solve for x
    x = 174,101.04/342.28
  6. Step 6: Final answer
    x = 508.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.