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Finding the Fourth Proportional to 1,894.80, 2,613.49 and 1,109.00

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Solution

The fourth proportional to 1,894.80, 2,613.49 and 1,109.00 is: 1,529.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,894.80 : 2,613.49 = 1,109.00 : x
  2. Step 2: Convert to fraction form
    1,894.80/2,613.49 = 1,109.00/x
  3. Step 3: Cross multiply
    1,894.80x = 2,613.49 × 1,109.00
  4. Step 4: Simplify right side
    1,894.80x = 2,898,364.17
  5. Step 5: Solve for x
    x = 2,898,364.17/1,894.80
  6. Step 6: Final answer
    x = 1,529.64

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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.