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Finding the Fourth Proportional to 1,888.50, 2,606.78 and 1,171.23

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Solution

The fourth proportional to 1,888.50, 2,606.78 and 1,171.23 is: 1,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888.50 : 2,606.78 = 1,171.23 : x
  2. Step 2: Convert to fraction form
    1,888.50/2,606.78 = 1,171.23/x
  3. Step 3: Cross multiply
    1,888.50x = 2,606.78 × 1,171.23
  4. Step 4: Simplify right side
    1,888.50x = 3,053,133.08
  5. Step 5: Solve for x
    x = 3,053,133.08/1,888.50
  6. Step 6: Final answer
    x = 1,616.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.