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Finding the Fourth Proportional to 510.81, 704.91 and 314.31

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Solution

The fourth proportional to 510.81, 704.91 and 314.31 is: 433.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.81 : 704.91 = 314.31 : x
  2. Step 2: Convert to fraction form
    510.81/704.91 = 314.31/x
  3. Step 3: Cross multiply
    510.81x = 704.91 × 314.31
  4. Step 4: Simplify right side
    510.81x = 221,560.26
  5. Step 5: Solve for x
    x = 221,560.26/510.81
  6. Step 6: Final answer
    x = 433.74

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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.