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Finding the Fourth Proportional to 2,564.23, 3,848.17 and 921.02

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Solution

The fourth proportional to 2,564.23, 3,848.17 and 921.02 is: 1,382.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,564.23 : 3,848.17 = 921.02 : x
  2. Step 2: Convert to fraction form
    2,564.23/3,848.17 = 921.02/x
  3. Step 3: Cross multiply
    2,564.23x = 3,848.17 × 921.02
  4. Step 4: Simplify right side
    2,564.23x = 3,544,241.53
  5. Step 5: Solve for x
    x = 3,544,241.53/2,564.23
  6. Step 6: Final answer
    x = 1,382.19

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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.