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Finding the Fourth Proportional to 716.70, 991.74 and 611.62

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Solution

The fourth proportional to 716.70, 991.74 and 611.62 is: 846.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.70 : 991.74 = 611.62 : x
  2. Step 2: Convert to fraction form
    716.70/991.74 = 611.62/x
  3. Step 3: Cross multiply
    716.70x = 991.74 × 611.62
  4. Step 4: Simplify right side
    716.70x = 606,568.02
  5. Step 5: Solve for x
    x = 606,568.02/716.70
  6. Step 6: Final answer
    x = 846.33

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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.