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Finding the Fourth Proportional to 2,019.84, 3,030.03 and 720.87

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Solution

The fourth proportional to 2,019.84, 3,030.03 and 720.87 is: 1,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.84 : 3,030.03 = 720.87 : x
  2. Step 2: Convert to fraction form
    2,019.84/3,030.03 = 720.87/x
  3. Step 3: Cross multiply
    2,019.84x = 3,030.03 × 720.87
  4. Step 4: Simplify right side
    2,019.84x = 2,184,257.73
  5. Step 5: Solve for x
    x = 2,184,257.73/2,019.84
  6. Step 6: Final answer
    x = 1,081.40

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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.