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Finding the Fourth Proportional to 3,588.39, 5,382.59 and 991.13

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Solution

The fourth proportional to 3,588.39, 5,382.59 and 991.13 is: 1,486.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,588.39 : 5,382.59 = 991.13 : x
  2. Step 2: Convert to fraction form
    3,588.39/5,382.59 = 991.13/x
  3. Step 3: Cross multiply
    3,588.39x = 5,382.59 × 991.13
  4. Step 4: Simplify right side
    3,588.39x = 5,334,814.56
  5. Step 5: Solve for x
    x = 5,334,814.56/3,588.39
  6. Step 6: Final answer
    x = 1,486.69

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.