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Finding the Fourth Proportional to 2,013.54, 3,019.95 and 780.66

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Solution

The fourth proportional to 2,013.54, 3,019.95 and 780.66 is: 1,170.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.54 : 3,019.95 = 780.66 : x
  2. Step 2: Convert to fraction form
    2,013.54/3,019.95 = 780.66/x
  3. Step 3: Cross multiply
    2,013.54x = 3,019.95 × 780.66
  4. Step 4: Simplify right side
    2,013.54x = 2,357,554.17
  5. Step 5: Solve for x
    x = 2,357,554.17/2,013.54
  6. Step 6: Final answer
    x = 1,170.85

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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.