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Finding the Fourth Proportional to 2,187.56, 3,017.80 and 1,479.65

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Solution

The fourth proportional to 2,187.56, 3,017.80 and 1,479.65 is: 2,041.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.56 : 3,017.80 = 1,479.65 : x
  2. Step 2: Convert to fraction form
    2,187.56/3,017.80 = 1,479.65/x
  3. Step 3: Cross multiply
    2,187.56x = 3,017.80 × 1,479.65
  4. Step 4: Simplify right side
    2,187.56x = 4,465,291.67
  5. Step 5: Solve for x
    x = 4,465,291.67/2,187.56
  6. Step 6: Final answer
    x = 2,041.22

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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.