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Finding the Fourth Proportional to 1,913.14, 2,869.02 and 817.58

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Solution

The fourth proportional to 1,913.14, 2,869.02 and 817.58 is: 1,226.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.14 : 2,869.02 = 817.58 : x
  2. Step 2: Convert to fraction form
    1,913.14/2,869.02 = 817.58/x
  3. Step 3: Cross multiply
    1,913.14x = 2,869.02 × 817.58
  4. Step 4: Simplify right side
    1,913.14x = 2,345,653.37
  5. Step 5: Solve for x
    x = 2,345,653.37/1,913.14
  6. Step 6: Final answer
    x = 1,226.08

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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.