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Finding the Fourth Proportional to 704.29, 971.32 and 515.47

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Solution

The fourth proportional to 704.29, 971.32 and 515.47 is: 710.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.29 : 971.32 = 515.47 : x
  2. Step 2: Convert to fraction form
    704.29/971.32 = 515.47/x
  3. Step 3: Cross multiply
    704.29x = 971.32 × 515.47
  4. Step 4: Simplify right side
    704.29x = 500,681.46
  5. Step 5: Solve for x
    x = 500,681.46/704.29
  6. Step 6: Final answer
    x = 710.91

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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.