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Finding the Fourth Proportional to 510.20, 704.13 and 392.30

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Solution

The fourth proportional to 510.20, 704.13 and 392.30 is: 541.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.20 : 704.13 = 392.30 : x
  2. Step 2: Convert to fraction form
    510.20/704.13 = 392.30/x
  3. Step 3: Cross multiply
    510.20x = 704.13 × 392.30
  4. Step 4: Simplify right side
    510.20x = 276,230.20
  5. Step 5: Solve for x
    x = 276,230.20/510.20
  6. Step 6: Final answer
    x = 541.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.