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Finding the Fourth Proportional to 893.52, 1,340.40 and 615.36

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Solution

The fourth proportional to 893.52, 1,340.40 and 615.36 is: 923.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.52 : 1,340.40 = 615.36 : x
  2. Step 2: Convert to fraction form
    893.52/1,340.40 = 615.36/x
  3. Step 3: Cross multiply
    893.52x = 1,340.40 × 615.36
  4. Step 4: Simplify right side
    893.52x = 824,828.54
  5. Step 5: Solve for x
    x = 824,828.54/893.52
  6. Step 6: Final answer
    x = 923.12

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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.