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Finding the Fourth Proportional to 1,304.48, 1,956.64 and 921.44

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Solution

The fourth proportional to 1,304.48, 1,956.64 and 921.44 is: 1,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.48 : 1,956.64 = 921.44 : x
  2. Step 2: Convert to fraction form
    1,304.48/1,956.64 = 921.44/x
  3. Step 3: Cross multiply
    1,304.48x = 1,956.64 × 921.44
  4. Step 4: Simplify right side
    1,304.48x = 1,802,926.36
  5. Step 5: Solve for x
    x = 1,802,926.36/1,304.48
  6. Step 6: Final answer
    x = 1,382.10

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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.