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Finding the Fourth Proportional to 1,214.99, 1,813.01 and 1,084.09

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Solution

The fourth proportional to 1,214.99, 1,813.01 and 1,084.09 is: 1,617.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.99 : 1,813.01 = 1,084.09 : x
  2. Step 2: Convert to fraction form
    1,214.99/1,813.01 = 1,084.09/x
  3. Step 3: Cross multiply
    1,214.99x = 1,813.01 × 1,084.09
  4. Step 4: Simplify right side
    1,214.99x = 1,965,460.59
  5. Step 5: Solve for x
    x = 1,965,460.59/1,214.99
  6. Step 6: Final answer
    x = 1,617.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.