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Finding the Fourth Proportional to 715.28, 986.53 and 466.68

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Solution

The fourth proportional to 715.28, 986.53 and 466.68 is: 643.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.28 : 986.53 = 466.68 : x
  2. Step 2: Convert to fraction form
    715.28/986.53 = 466.68/x
  3. Step 3: Cross multiply
    715.28x = 986.53 × 466.68
  4. Step 4: Simplify right side
    715.28x = 460,391.49
  5. Step 5: Solve for x
    x = 460,391.49/715.28
  6. Step 6: Final answer
    x = 643.65

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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.