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Finding the Fourth Proportional to 3,165.62, 4,368.78 and 1,986.50

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Solution

The fourth proportional to 3,165.62, 4,368.78 and 1,986.50 is: 2,741.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,165.62 : 4,368.78 = 1,986.50 : x
  2. Step 2: Convert to fraction form
    3,165.62/4,368.78 = 1,986.50/x
  3. Step 3: Cross multiply
    3,165.62x = 4,368.78 × 1,986.50
  4. Step 4: Simplify right side
    3,165.62x = 8,678,581.47
  5. Step 5: Solve for x
    x = 8,678,581.47/3,165.62
  6. Step 6: Final answer
    x = 2,741.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.