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Finding the Fourth Proportional to 4,761.34, 7,143.15 and 1,986.47

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Solution

The fourth proportional to 4,761.34, 7,143.15 and 1,986.47 is: 2,980.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,761.34 : 7,143.15 = 1,986.47 : x
  2. Step 2: Convert to fraction form
    4,761.34/7,143.15 = 1,986.47/x
  3. Step 3: Cross multiply
    4,761.34x = 7,143.15 × 1,986.47
  4. Step 4: Simplify right side
    4,761.34x = 14,189,671.04
  5. Step 5: Solve for x
    x = 14,189,671.04/4,761.34
  6. Step 6: Final answer
    x = 2,980.18

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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.