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Finding the Fourth Proportional to 931.28, 1,284.60 and 599.34

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Solution

The fourth proportional to 931.28, 1,284.60 and 599.34 is: 826.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.28 : 1,284.60 = 599.34 : x
  2. Step 2: Convert to fraction form
    931.28/1,284.60 = 599.34/x
  3. Step 3: Cross multiply
    931.28x = 1,284.60 × 599.34
  4. Step 4: Simplify right side
    931.28x = 769,912.16
  5. Step 5: Solve for x
    x = 769,912.16/931.28
  6. Step 6: Final answer
    x = 826.72

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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.