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Finding the Fourth Proportional to 342.84, 511.44 and 305.76

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Solution

The fourth proportional to 342.84, 511.44 and 305.76 is: 456.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.84 : 511.44 = 305.76 : x
  2. Step 2: Convert to fraction form
    342.84/511.44 = 305.76/x
  3. Step 3: Cross multiply
    342.84x = 511.44 × 305.76
  4. Step 4: Simplify right side
    342.84x = 156,377.89
  5. Step 5: Solve for x
    x = 156,377.89/342.84
  6. Step 6: Final answer
    x = 456.12

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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.