Home / 2,187.30-3,284.60-1,438.05

Finding the Fourth Proportional to 2,187.30, 3,284.60 and 1,438.05

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Solution

The fourth proportional to 2,187.30, 3,284.60 and 1,438.05 is: 2,159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.30 : 3,284.60 = 1,438.05 : x
  2. Step 2: Convert to fraction form
    2,187.30/3,284.60 = 1,438.05/x
  3. Step 3: Cross multiply
    2,187.30x = 3,284.60 × 1,438.05
  4. Step 4: Simplify right side
    2,187.30x = 4,723,411.84
  5. Step 5: Solve for x
    x = 4,723,411.84/2,187.30
  6. Step 6: Final answer
    x = 2,159.47

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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.