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Finding the Fourth Proportional to 1,364.40, 1,882.44 and 1,213.20

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Solution

The fourth proportional to 1,364.40, 1,882.44 and 1,213.20 is: 1,673.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,364.40 : 1,882.44 = 1,213.20 : x
  2. Step 2: Convert to fraction form
    1,364.40/1,882.44 = 1,213.20/x
  3. Step 3: Cross multiply
    1,364.40x = 1,882.44 × 1,213.20
  4. Step 4: Simplify right side
    1,364.40x = 2,283,776.21
  5. Step 5: Solve for x
    x = 2,283,776.21/1,364.40
  6. Step 6: Final answer
    x = 1,673.83

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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.