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Finding the Fourth Proportional to 2,220.70, 3,331.04 and 577.20

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Solution

The fourth proportional to 2,220.70, 3,331.04 and 577.20 is: 865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.70 : 3,331.04 = 577.20 : x
  2. Step 2: Convert to fraction form
    2,220.70/3,331.04 = 577.20/x
  3. Step 3: Cross multiply
    2,220.70x = 3,331.04 × 577.20
  4. Step 4: Simplify right side
    2,220.70x = 1,922,676.29
  5. Step 5: Solve for x
    x = 1,922,676.29/2,220.70
  6. Step 6: Final answer
    x = 865.80

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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.