Home / 2,780.26-4,162.08-1,681.28

Finding the Fourth Proportional to 2,780.26, 4,162.08 and 1,681.28

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Solution

The fourth proportional to 2,780.26, 4,162.08 and 1,681.28 is: 2,516.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.26 : 4,162.08 = 1,681.28 : x
  2. Step 2: Convert to fraction form
    2,780.26/4,162.08 = 1,681.28/x
  3. Step 3: Cross multiply
    2,780.26x = 4,162.08 × 1,681.28
  4. Step 4: Simplify right side
    2,780.26x = 6,997,621.86
  5. Step 5: Solve for x
    x = 6,997,621.86/2,780.26
  6. Step 6: Final answer
    x = 2,516.89

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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.