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Finding the Fourth Proportional to 622.95, 854.31 and 615.75

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Solution

The fourth proportional to 622.95, 854.31 and 615.75 is: 844.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.95 : 854.31 = 615.75 : x
  2. Step 2: Convert to fraction form
    622.95/854.31 = 615.75/x
  3. Step 3: Cross multiply
    622.95x = 854.31 × 615.75
  4. Step 4: Simplify right side
    622.95x = 526,041.38
  5. Step 5: Solve for x
    x = 526,041.38/622.95
  6. Step 6: Final answer
    x = 844.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.