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Finding the Fourth Proportional to 340.88, 510.72 and 142.79

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Solution

The fourth proportional to 340.88, 510.72 and 142.79 is: 213.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.88 : 510.72 = 142.79 : x
  2. Step 2: Convert to fraction form
    340.88/510.72 = 142.79/x
  3. Step 3: Cross multiply
    340.88x = 510.72 × 142.79
  4. Step 4: Simplify right side
    340.88x = 72,923.45
  5. Step 5: Solve for x
    x = 72,923.45/340.88
  6. Step 6: Final answer
    x = 213.92

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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.