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Finding the Fourth Proportional to 2,991.60, 4,448.64 and 2,899.20

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Solution

The fourth proportional to 2,991.60, 4,448.64 and 2,899.20 is: 4,311.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.60 : 4,448.64 = 2,899.20 : x
  2. Step 2: Convert to fraction form
    2,991.60/4,448.64 = 2,899.20/x
  3. Step 3: Cross multiply
    2,991.60x = 4,448.64 × 2,899.20
  4. Step 4: Simplify right side
    2,991.60x = 12,897,497.09
  5. Step 5: Solve for x
    x = 12,897,497.09/2,991.60
  6. Step 6: Final answer
    x = 4,311.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.