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Finding the Fourth Proportional to 3,588.08, 5,381.51 and 990.41

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Solution

The fourth proportional to 3,588.08, 5,381.51 and 990.41 is: 1,485.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,588.08 : 5,381.51 = 990.41 : x
  2. Step 2: Convert to fraction form
    3,588.08/5,381.51 = 990.41/x
  3. Step 3: Cross multiply
    3,588.08x = 5,381.51 × 990.41
  4. Step 4: Simplify right side
    3,588.08x = 5,329,869.46
  5. Step 5: Solve for x
    x = 5,329,869.46/3,588.08
  6. Step 6: Final answer
    x = 1,485.44

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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.