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Finding the Fourth Proportional to 933.28, 1,393.09 and 891.16

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Solution

The fourth proportional to 933.28, 1,393.09 and 891.16 is: 1,330.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.28 : 1,393.09 = 891.16 : x
  2. Step 2: Convert to fraction form
    933.28/1,393.09 = 891.16/x
  3. Step 3: Cross multiply
    933.28x = 1,393.09 × 891.16
  4. Step 4: Simplify right side
    933.28x = 1,241,466.08
  5. Step 5: Solve for x
    x = 1,241,466.08/933.28
  6. Step 6: Final answer
    x = 1,330.22

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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.