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Finding the Fourth Proportional to 2,220.74, 3,331.85 and 988.23

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Solution

The fourth proportional to 2,220.74, 3,331.85 and 988.23 is: 1,482.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.74 : 3,331.85 = 988.23 : x
  2. Step 2: Convert to fraction form
    2,220.74/3,331.85 = 988.23/x
  3. Step 3: Cross multiply
    2,220.74x = 3,331.85 × 988.23
  4. Step 4: Simplify right side
    2,220.74x = 3,292,629.18
  5. Step 5: Solve for x
    x = 3,292,629.18/2,220.74
  6. Step 6: Final answer
    x = 1,482.68

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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.