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Finding the Fourth Proportional to 1,304.64, 1,956.99 and 380.30

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Solution

The fourth proportional to 1,304.64, 1,956.99 and 380.30 is: 570.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.64 : 1,956.99 = 380.30 : x
  2. Step 2: Convert to fraction form
    1,304.64/1,956.99 = 380.30/x
  3. Step 3: Cross multiply
    1,304.64x = 1,956.99 × 380.30
  4. Step 4: Simplify right side
    1,304.64x = 744,233.51
  5. Step 5: Solve for x
    x = 744,233.51/1,304.64
  6. Step 6: Final answer
    x = 570.45

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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.