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Finding the Fourth Proportional to 2,887.65, 4,011.73 and 2,860.65

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Solution

The fourth proportional to 2,887.65, 4,011.73 and 2,860.65 is: 3,974.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.65 : 4,011.73 = 2,860.65 : x
  2. Step 2: Convert to fraction form
    2,887.65/4,011.73 = 2,860.65/x
  3. Step 3: Cross multiply
    2,887.65x = 4,011.73 × 2,860.65
  4. Step 4: Simplify right side
    2,887.65x = 11,476,148.27
  5. Step 5: Solve for x
    x = 11,476,148.27/2,887.65
  6. Step 6: Final answer
    x = 3,974.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.