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Finding the Fourth Proportional to 715.52, 986.88 and 482.56

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Solution

The fourth proportional to 715.52, 986.88 and 482.56 is: 665.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.52 : 986.88 = 482.56 : x
  2. Step 2: Convert to fraction form
    715.52/986.88 = 482.56/x
  3. Step 3: Cross multiply
    715.52x = 986.88 × 482.56
  4. Step 4: Simplify right side
    715.52x = 476,228.81
  5. Step 5: Solve for x
    x = 476,228.81/715.52
  6. Step 6: Final answer
    x = 665.57

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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.