Home / 1,243.26-1,855.77-1,153.14

Finding the Fourth Proportional to 1,243.26, 1,855.77 and 1,153.14

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Solution

The fourth proportional to 1,243.26, 1,855.77 and 1,153.14 is: 1,721.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.26 : 1,855.77 = 1,153.14 : x
  2. Step 2: Convert to fraction form
    1,243.26/1,855.77 = 1,153.14/x
  3. Step 3: Cross multiply
    1,243.26x = 1,855.77 × 1,153.14
  4. Step 4: Simplify right side
    1,243.26x = 2,139,962.62
  5. Step 5: Solve for x
    x = 2,139,962.62/1,243.26
  6. Step 6: Final answer
    x = 1,721.25

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Half scale
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Double scale
Find fourth proportional to 1,244.26, 1,857.26 and 1,154.14
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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.