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Finding the Fourth Proportional to 340.44, 510.80 and 218.68

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Solution

The fourth proportional to 340.44, 510.80 and 218.68 is: 328.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.44 : 510.80 = 218.68 : x
  2. Step 2: Convert to fraction form
    340.44/510.80 = 218.68/x
  3. Step 3: Cross multiply
    340.44x = 510.80 × 218.68
  4. Step 4: Simplify right side
    340.44x = 111,701.74
  5. Step 5: Solve for x
    x = 111,701.74/340.44
  6. Step 6: Final answer
    x = 328.11

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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.