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Finding the Fourth Proportional to 940.84, 1,400.18 and 906.28

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Solution

The fourth proportional to 940.84, 1,400.18 and 906.28 is: 1,348.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.84 : 1,400.18 = 906.28 : x
  2. Step 2: Convert to fraction form
    940.84/1,400.18 = 906.28/x
  3. Step 3: Cross multiply
    940.84x = 1,400.18 × 906.28
  4. Step 4: Simplify right side
    940.84x = 1,268,955.13
  5. Step 5: Solve for x
    x = 1,268,955.13/940.84
  6. Step 6: Final answer
    x = 1,348.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.