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Finding the Fourth Proportional to 2,800.72, 3,864.36 and 1,681.36

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Solution

The fourth proportional to 2,800.72, 3,864.36 and 1,681.36 is: 2,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.72 : 3,864.36 = 1,681.36 : x
  2. Step 2: Convert to fraction form
    2,800.72/3,864.36 = 1,681.36/x
  3. Step 3: Cross multiply
    2,800.72x = 3,864.36 × 1,681.36
  4. Step 4: Simplify right side
    2,800.72x = 6,497,380.33
  5. Step 5: Solve for x
    x = 6,497,380.33/2,800.72
  6. Step 6: Final answer
    x = 2,319.90

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1.5x scale

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.