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Finding the Fourth Proportional to 2,014.07, 3,020.51 and 781.20

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Solution

The fourth proportional to 2,014.07, 3,020.51 and 781.20 is: 1,171.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,014.07 : 3,020.51 = 781.20 : x
  2. Step 2: Convert to fraction form
    2,014.07/3,020.51 = 781.20/x
  3. Step 3: Cross multiply
    2,014.07x = 3,020.51 × 781.20
  4. Step 4: Simplify right side
    2,014.07x = 2,359,622.41
  5. Step 5: Solve for x
    x = 2,359,622.41/2,014.07
  6. Step 6: Final answer
    x = 1,171.57

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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.