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Finding the Fourth Proportional to 1,815.57, 2,722.28 and 775.04

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Solution

The fourth proportional to 1,815.57, 2,722.28 and 775.04 is: 1,162.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.57 : 2,722.28 = 775.04 : x
  2. Step 2: Convert to fraction form
    1,815.57/2,722.28 = 775.04/x
  3. Step 3: Cross multiply
    1,815.57x = 2,722.28 × 775.04
  4. Step 4: Simplify right side
    1,815.57x = 2,109,875.89
  5. Step 5: Solve for x
    x = 2,109,875.89/1,815.57
  6. Step 6: Final answer
    x = 1,162.10

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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.