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Finding the Fourth Proportional to 3,587.00, 5,380.50 and 990.14

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Solution

The fourth proportional to 3,587.00, 5,380.50 and 990.14 is: 1,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.00 : 5,380.50 = 990.14 : x
  2. Step 2: Convert to fraction form
    3,587.00/5,380.50 = 990.14/x
  3. Step 3: Cross multiply
    3,587.00x = 5,380.50 × 990.14
  4. Step 4: Simplify right side
    3,587.00x = 5,327,421.37
  5. Step 5: Solve for x
    x = 5,327,421.37/3,587.00
  6. Step 6: Final answer
    x = 1,485.20

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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.