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Finding the Fourth Proportional to 3,588.64, 5,382.38 and 990.97

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Solution

The fourth proportional to 3,588.64, 5,382.38 and 990.97 is: 1,486.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,588.64 : 5,382.38 = 990.97 : x
  2. Step 2: Convert to fraction form
    3,588.64/5,382.38 = 990.97/x
  3. Step 3: Cross multiply
    3,588.64x = 5,382.38 × 990.97
  4. Step 4: Simplify right side
    3,588.64x = 5,333,766.13
  5. Step 5: Solve for x
    x = 5,333,766.13/3,588.64
  6. Step 6: Final answer
    x = 1,486.29

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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.