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Finding the Fourth Proportional to 949.45, 1,310.31 and 716.17

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Solution

The fourth proportional to 949.45, 1,310.31 and 716.17 is: 988.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.45 : 1,310.31 = 716.17 : x
  2. Step 2: Convert to fraction form
    949.45/1,310.31 = 716.17/x
  3. Step 3: Cross multiply
    949.45x = 1,310.31 × 716.17
  4. Step 4: Simplify right side
    949.45x = 938,404.71
  5. Step 5: Solve for x
    x = 938,404.71/949.45
  6. Step 6: Final answer
    x = 988.37

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Double scale
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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.