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Finding the Fourth Proportional to 1,284.96, 1,928.03 and 699.09

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Solution

The fourth proportional to 1,284.96, 1,928.03 and 699.09 is: 1,048.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.96 : 1,928.03 = 699.09 : x
  2. Step 2: Convert to fraction form
    1,284.96/1,928.03 = 699.09/x
  3. Step 3: Cross multiply
    1,284.96x = 1,928.03 × 699.09
  4. Step 4: Simplify right side
    1,284.96x = 1,347,864.29
  5. Step 5: Solve for x
    x = 1,347,864.29/1,284.96
  6. Step 6: Final answer
    x = 1,048.95

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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.