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Finding the Fourth Proportional to 2,020.03, 3,030.35 and 721.20

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Solution

The fourth proportional to 2,020.03, 3,030.35 and 721.20 is: 1,081.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,020.03 : 3,030.35 = 721.20 : x
  2. Step 2: Convert to fraction form
    2,020.03/3,030.35 = 721.20/x
  3. Step 3: Cross multiply
    2,020.03x = 3,030.35 × 721.20
  4. Step 4: Simplify right side
    2,020.03x = 2,185,488.42
  5. Step 5: Solve for x
    x = 2,185,488.42/2,020.03
  6. Step 6: Final answer
    x = 1,081.91

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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.