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Finding the Fourth Proportional to 715.22, 986.37 and 482.66

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Solution

The fourth proportional to 715.22, 986.37 and 482.66 is: 665.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.22 : 986.37 = 482.66 : x
  2. Step 2: Convert to fraction form
    715.22/986.37 = 482.66/x
  3. Step 3: Cross multiply
    715.22x = 986.37 × 482.66
  4. Step 4: Simplify right side
    715.22x = 476,081.34
  5. Step 5: Solve for x
    x = 476,081.34/715.22
  6. Step 6: Final answer
    x = 665.64

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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.