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Finding the Fourth Proportional to 2,839.77, 4,259.34 and 990.91

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Solution

The fourth proportional to 2,839.77, 4,259.34 and 990.91 is: 1,486.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.77 : 4,259.34 = 990.91 : x
  2. Step 2: Convert to fraction form
    2,839.77/4,259.34 = 990.91/x
  3. Step 3: Cross multiply
    2,839.77x = 4,259.34 × 990.91
  4. Step 4: Simplify right side
    2,839.77x = 4,220,646.73
  5. Step 5: Solve for x
    x = 4,220,646.73/2,839.77
  6. Step 6: Final answer
    x = 1,486.27

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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.