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Finding the Fourth Proportional to 2,854.81, 4,282.30 and 774.81

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Solution

The fourth proportional to 2,854.81, 4,282.30 and 774.81 is: 1,162.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,854.81 : 4,282.30 = 774.81 : x
  2. Step 2: Convert to fraction form
    2,854.81/4,282.30 = 774.81/x
  3. Step 3: Cross multiply
    2,854.81x = 4,282.30 × 774.81
  4. Step 4: Simplify right side
    2,854.81x = 3,317,947.45
  5. Step 5: Solve for x
    x = 3,317,947.45/2,854.81
  6. Step 6: Final answer
    x = 1,162.23

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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.