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Finding the Fourth Proportional to 1,805.07, 2,490.90 and 1,019.19

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Solution

The fourth proportional to 1,805.07, 2,490.90 and 1,019.19 is: 1,406.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.07 : 2,490.90 = 1,019.19 : x
  2. Step 2: Convert to fraction form
    1,805.07/2,490.90 = 1,019.19/x
  3. Step 3: Cross multiply
    1,805.07x = 2,490.90 × 1,019.19
  4. Step 4: Simplify right side
    1,805.07x = 2,538,700.37
  5. Step 5: Solve for x
    x = 2,538,700.37/1,805.07
  6. Step 6: Final answer
    x = 1,406.43

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Double scale
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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.