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Finding the Fourth Proportional to 510.68, 704.93 and 399.71

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Solution

The fourth proportional to 510.68, 704.93 and 399.71 is: 551.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.68 : 704.93 = 399.71 : x
  2. Step 2: Convert to fraction form
    510.68/704.93 = 399.71/x
  3. Step 3: Cross multiply
    510.68x = 704.93 × 399.71
  4. Step 4: Simplify right side
    510.68x = 281,767.57
  5. Step 5: Solve for x
    x = 281,767.57/510.68
  6. Step 6: Final answer
    x = 551.75

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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.