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Finding the Fourth Proportional to 3,318.49, 4,978.19 and 1,126.63

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Solution

The fourth proportional to 3,318.49, 4,978.19 and 1,126.63 is: 1,690.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.49 : 4,978.19 = 1,126.63 : x
  2. Step 2: Convert to fraction form
    3,318.49/4,978.19 = 1,126.63/x
  3. Step 3: Cross multiply
    3,318.49x = 4,978.19 × 1,126.63
  4. Step 4: Simplify right side
    3,318.49x = 5,608,547.68
  5. Step 5: Solve for x
    x = 5,608,547.68/3,318.49
  6. Step 6: Final answer
    x = 1,690.09

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1.5x scale

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.