Home / 2,991.36-4,122.72-2,294.40

Finding the Fourth Proportional to 2,991.36, 4,122.72 and 2,294.40

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Solution

The fourth proportional to 2,991.36, 4,122.72 and 2,294.40 is: 3,162.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.36 : 4,122.72 = 2,294.40 : x
  2. Step 2: Convert to fraction form
    2,991.36/4,122.72 = 2,294.40/x
  3. Step 3: Cross multiply
    2,991.36x = 4,122.72 × 2,294.40
  4. Step 4: Simplify right side
    2,991.36x = 9,459,168.77
  5. Step 5: Solve for x
    x = 9,459,168.77/2,991.36
  6. Step 6: Final answer
    x = 3,162.16

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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.