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Finding the Fourth Proportional to 715.27, 986.48 and 482.35

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Solution

The fourth proportional to 715.27, 986.48 and 482.35 is: 665.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.27 : 986.48 = 482.35 : x
  2. Step 2: Convert to fraction form
    715.27/986.48 = 482.35/x
  3. Step 3: Cross multiply
    715.27x = 986.48 × 482.35
  4. Step 4: Simplify right side
    715.27x = 475,824.90
  5. Step 5: Solve for x
    x = 475,824.90/715.27
  6. Step 6: Final answer
    x = 665.24

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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.