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Finding the Fourth Proportional to 1,805.12, 2,491.07 and 1,019.16

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Solution

The fourth proportional to 1,805.12, 2,491.07 and 1,019.16 is: 1,406.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.12 : 2,491.07 = 1,019.16 : x
  2. Step 2: Convert to fraction form
    1,805.12/2,491.07 = 1,019.16/x
  3. Step 3: Cross multiply
    1,805.12x = 2,491.07 × 1,019.16
  4. Step 4: Simplify right side
    1,805.12x = 2,538,793.81
  5. Step 5: Solve for x
    x = 2,538,793.81/1,805.12
  6. Step 6: Final answer
    x = 1,406.44

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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.