Home / 2,079.30-3,118.05-1,038.90

Finding the Fourth Proportional to 2,079.30, 3,118.05 and 1,038.90

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Solution

The fourth proportional to 2,079.30, 3,118.05 and 1,038.90 is: 1,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.30 : 3,118.05 = 1,038.90 : x
  2. Step 2: Convert to fraction form
    2,079.30/3,118.05 = 1,038.90/x
  3. Step 3: Cross multiply
    2,079.30x = 3,118.05 × 1,038.90
  4. Step 4: Simplify right side
    2,079.30x = 3,239,342.15
  5. Step 5: Solve for x
    x = 3,239,342.15/2,079.30
  6. Step 6: Final answer
    x = 1,557.90

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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.