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Finding the Fourth Proportional to 1,555.74, 2,333.92 and 863.40

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Solution

The fourth proportional to 1,555.74, 2,333.92 and 863.40 is: 1,295.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.74 : 2,333.92 = 863.40 : x
  2. Step 2: Convert to fraction form
    1,555.74/2,333.92 = 863.40/x
  3. Step 3: Cross multiply
    1,555.74x = 2,333.92 × 863.40
  4. Step 4: Simplify right side
    1,555.74x = 2,015,106.53
  5. Step 5: Solve for x
    x = 2,015,106.53/1,555.74
  6. Step 6: Final answer
    x = 1,295.27

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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.