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Finding the Fourth Proportional to 716.81, 989.66 and 451.62

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Solution

The fourth proportional to 716.81, 989.66 and 451.62 is: 623.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.81 : 989.66 = 451.62 : x
  2. Step 2: Convert to fraction form
    716.81/989.66 = 451.62/x
  3. Step 3: Cross multiply
    716.81x = 989.66 × 451.62
  4. Step 4: Simplify right side
    716.81x = 446,951.38
  5. Step 5: Solve for x
    x = 446,951.38/716.81
  6. Step 6: Final answer
    x = 623.53

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1.5x scale

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.