Home / 2,840.28-4,260.72-990.66

Finding the Fourth Proportional to 2,840.28, 4,260.72 and 990.66

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Solution

The fourth proportional to 2,840.28, 4,260.72 and 990.66 is: 1,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.28 : 4,260.72 = 990.66 : x
  2. Step 2: Convert to fraction form
    2,840.28/4,260.72 = 990.66/x
  3. Step 3: Cross multiply
    2,840.28x = 4,260.72 × 990.66
  4. Step 4: Simplify right side
    2,840.28x = 4,220,924.88
  5. Step 5: Solve for x
    x = 4,220,924.88/2,840.28
  6. Step 6: Final answer
    x = 1,486.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.