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Finding the Fourth Proportional to 2,487.77, 3,433.13 and 1,368.78

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Solution

The fourth proportional to 2,487.77, 3,433.13 and 1,368.78 is: 1,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.77 : 3,433.13 = 1,368.78 : x
  2. Step 2: Convert to fraction form
    2,487.77/3,433.13 = 1,368.78/x
  3. Step 3: Cross multiply
    2,487.77x = 3,433.13 × 1,368.78
  4. Step 4: Simplify right side
    2,487.77x = 4,699,199.68
  5. Step 5: Solve for x
    x = 4,699,199.68/2,487.77
  6. Step 6: Final answer
    x = 1,888.92

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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.