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Finding the Fourth Proportional to 2,633.19, 3,947 and 877.72

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Solution

The fourth proportional to 2,633.19, 3,947 and 877.72 is: 1,315.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,633.19 : 3,947 = 877.72 : x
  2. Step 2: Convert to fraction form
    2,633.19/3,947 = 877.72/x
  3. Step 3: Cross multiply
    2,633.19x = 3,947 × 877.72
  4. Step 4: Simplify right side
    2,633.19x = 3,464,360.84
  5. Step 5: Solve for x
    x = 3,464,360.84/2,633.19
  6. Step 6: Final answer
    x = 1,315.65

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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.