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Finding the Fourth Proportional to 1,869.19, 2,801.32 and 772.04

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Solution

The fourth proportional to 1,869.19, 2,801.32 and 772.04 is: 1,157.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.19 : 2,801.32 = 772.04 : x
  2. Step 2: Convert to fraction form
    1,869.19/2,801.32 = 772.04/x
  3. Step 3: Cross multiply
    1,869.19x = 2,801.32 × 772.04
  4. Step 4: Simplify right side
    1,869.19x = 2,162,736.17
  5. Step 5: Solve for x
    x = 2,162,736.17/1,869.19
  6. Step 6: Final answer
    x = 1,157.05

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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.