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Finding the Fourth Proportional to 1,899.81, 2,620.49 and 1,113.30

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Solution

The fourth proportional to 1,899.81, 2,620.49 and 1,113.30 is: 1,535.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.81 : 2,620.49 = 1,113.30 : x
  2. Step 2: Convert to fraction form
    1,899.81/2,620.49 = 1,113.30/x
  3. Step 3: Cross multiply
    1,899.81x = 2,620.49 × 1,113.30
  4. Step 4: Simplify right side
    1,899.81x = 2,917,385.95
  5. Step 5: Solve for x
    x = 2,917,385.95/1,899.81
  6. Step 6: Final answer
    x = 1,535.62

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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.