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Finding the Fourth Proportional to 930.42, 1,284.27 and 615.96

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Solution

The fourth proportional to 930.42, 1,284.27 and 615.96 is: 850.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.42 : 1,284.27 = 615.96 : x
  2. Step 2: Convert to fraction form
    930.42/1,284.27 = 615.96/x
  3. Step 3: Cross multiply
    930.42x = 1,284.27 × 615.96
  4. Step 4: Simplify right side
    930.42x = 791,058.95
  5. Step 5: Solve for x
    x = 791,058.95/930.42
  6. Step 6: Final answer
    x = 850.22

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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.