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Finding the Fourth Proportional to 889.44, 1,333.59 and 615.21

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Solution

The fourth proportional to 889.44, 1,333.59 and 615.21 is: 922.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.44 : 1,333.59 = 615.21 : x
  2. Step 2: Convert to fraction form
    889.44/1,333.59 = 615.21/x
  3. Step 3: Cross multiply
    889.44x = 1,333.59 × 615.21
  4. Step 4: Simplify right side
    889.44x = 820,437.90
  5. Step 5: Solve for x
    x = 820,437.90/889.44
  6. Step 6: Final answer
    x = 922.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.