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Finding the Fourth Proportional to 2,891.97, 3,992.90 and 1,845.45

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Solution

The fourth proportional to 2,891.97, 3,992.90 and 1,845.45 is: 2,547.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.97 : 3,992.90 = 1,845.45 : x
  2. Step 2: Convert to fraction form
    2,891.97/3,992.90 = 1,845.45/x
  3. Step 3: Cross multiply
    2,891.97x = 3,992.90 × 1,845.45
  4. Step 4: Simplify right side
    2,891.97x = 7,368,688.08
  5. Step 5: Solve for x
    x = 7,368,688.08/2,891.97
  6. Step 6: Final answer
    x = 2,547.98

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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.