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Finding the Fourth Proportional to 2,899.68, 3,999.42 and 2,151.24

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Solution

The fourth proportional to 2,899.68, 3,999.42 and 2,151.24 is: 2,967.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,899.68 : 3,999.42 = 2,151.24 : x
  2. Step 2: Convert to fraction form
    2,899.68/3,999.42 = 2,151.24/x
  3. Step 3: Cross multiply
    2,899.68x = 3,999.42 × 2,151.24
  4. Step 4: Simplify right side
    2,899.68x = 8,603,712.28
  5. Step 5: Solve for x
    x = 8,603,712.28/2,899.68
  6. Step 6: Final answer
    x = 2,967.12

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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.