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Finding the Fourth Proportional to 2,988.81, 4,453.17 and 2,821.14

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Solution

The fourth proportional to 2,988.81, 4,453.17 and 2,821.14 is: 4,203.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.81 : 4,453.17 = 2,821.14 : x
  2. Step 2: Convert to fraction form
    2,988.81/4,453.17 = 2,821.14/x
  3. Step 3: Cross multiply
    2,988.81x = 4,453.17 × 2,821.14
  4. Step 4: Simplify right side
    2,988.81x = 12,563,016.01
  5. Step 5: Solve for x
    x = 12,563,016.01/2,988.81
  6. Step 6: Final answer
    x = 4,203.35

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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.