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Finding the Fourth Proportional to 940.70, 1,297.89 and 816.17

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Solution

The fourth proportional to 940.70, 1,297.89 and 816.17 is: 1,126.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.70 : 1,297.89 = 816.17 : x
  2. Step 2: Convert to fraction form
    940.70/1,297.89 = 816.17/x
  3. Step 3: Cross multiply
    940.70x = 1,297.89 × 816.17
  4. Step 4: Simplify right side
    940.70x = 1,059,292.39
  5. Step 5: Solve for x
    x = 1,059,292.39/940.70
  6. Step 6: Final answer
    x = 1,126.07

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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.