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Finding the Fourth Proportional to 2,990.16, 4,129.08 and 2,826.48

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Solution

The fourth proportional to 2,990.16, 4,129.08 and 2,826.48 is: 3,903.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.16 : 4,129.08 = 2,826.48 : x
  2. Step 2: Convert to fraction form
    2,990.16/4,129.08 = 2,826.48/x
  3. Step 3: Cross multiply
    2,990.16x = 4,129.08 × 2,826.48
  4. Step 4: Simplify right side
    2,990.16x = 11,670,762.04
  5. Step 5: Solve for x
    x = 11,670,762.04/2,990.16
  6. Step 6: Final answer
    x = 3,903.06

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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.