Home / 1,678.08-2,315.72-1,039.85

Finding the Fourth Proportional to 1,678.08, 2,315.72 and 1,039.85

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Solution

The fourth proportional to 1,678.08, 2,315.72 and 1,039.85 is: 1,434.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.08 : 2,315.72 = 1,039.85 : x
  2. Step 2: Convert to fraction form
    1,678.08/2,315.72 = 1,039.85/x
  3. Step 3: Cross multiply
    1,678.08x = 2,315.72 × 1,039.85
  4. Step 4: Simplify right side
    1,678.08x = 2,408,001.44
  5. Step 5: Solve for x
    x = 2,408,001.44/1,678.08
  6. Step 6: Final answer
    x = 1,434.97

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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.