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Finding the Fourth Proportional to 340.79, 510.17 and 219.15

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Solution

The fourth proportional to 340.79, 510.17 and 219.15 is: 328.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.79 : 510.17 = 219.15 : x
  2. Step 2: Convert to fraction form
    340.79/510.17 = 219.15/x
  3. Step 3: Cross multiply
    340.79x = 510.17 × 219.15
  4. Step 4: Simplify right side
    340.79x = 111,802.66
  5. Step 5: Solve for x
    x = 111,802.66/340.79
  6. Step 6: Final answer
    x = 328.07

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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.