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Finding the Fourth Proportional to 339.30, 510.30 and 304.20

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Solution

The fourth proportional to 339.30, 510.30 and 304.20 is: 457.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.30 : 510.30 = 304.20 : x
  2. Step 2: Convert to fraction form
    339.30/510.30 = 304.20/x
  3. Step 3: Cross multiply
    339.30x = 510.30 × 304.20
  4. Step 4: Simplify right side
    339.30x = 155,233.26
  5. Step 5: Solve for x
    x = 155,233.26/339.30
  6. Step 6: Final answer
    x = 457.51

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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.