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Finding the Fourth Proportional to 3,165.89, 4,747.39 and 1,315.90

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Solution

The fourth proportional to 3,165.89, 4,747.39 and 1,315.90 is: 1,973.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,165.89 : 4,747.39 = 1,315.90 : x
  2. Step 2: Convert to fraction form
    3,165.89/4,747.39 = 1,315.90/x
  3. Step 3: Cross multiply
    3,165.89x = 4,747.39 × 1,315.90
  4. Step 4: Simplify right side
    3,165.89x = 6,247,090.50
  5. Step 5: Solve for x
    x = 6,247,090.50/3,165.89
  6. Step 6: Final answer
    x = 1,973.25

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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.