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Finding the Fourth Proportional to 1,868.83, 2,579 and 1,072.19

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Solution

The fourth proportional to 1,868.83, 2,579 and 1,072.19 is: 1,479.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.83 : 2,579 = 1,072.19 : x
  2. Step 2: Convert to fraction form
    1,868.83/2,579 = 1,072.19/x
  3. Step 3: Cross multiply
    1,868.83x = 2,579 × 1,072.19
  4. Step 4: Simplify right side
    1,868.83x = 2,765,178.01
  5. Step 5: Solve for x
    x = 2,765,178.01/1,868.83
  6. Step 6: Final answer
    x = 1,479.63

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Double scale
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1.5x scale

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.