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Finding the Fourth Proportional to 510.91, 704.55 and 314.38

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Solution

The fourth proportional to 510.91, 704.55 and 314.38 is: 433.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.91 : 704.55 = 314.38 : x
  2. Step 2: Convert to fraction form
    510.91/704.55 = 314.38/x
  3. Step 3: Cross multiply
    510.91x = 704.55 × 314.38
  4. Step 4: Simplify right side
    510.91x = 221,496.72
  5. Step 5: Solve for x
    x = 221,496.72/510.91
  6. Step 6: Final answer
    x = 433.54

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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.