Home / 3,587.10-5,380.60-990.02

Finding the Fourth Proportional to 3,587.10, 5,380.60 and 990.02

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Solution

The fourth proportional to 3,587.10, 5,380.60 and 990.02 is: 1,485.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.10 : 5,380.60 = 990.02 : x
  2. Step 2: Convert to fraction form
    3,587.10/5,380.60 = 990.02/x
  3. Step 3: Cross multiply
    3,587.10x = 5,380.60 × 990.02
  4. Step 4: Simplify right side
    3,587.10x = 5,326,901.61
  5. Step 5: Solve for x
    x = 5,326,901.61/3,587.10
  6. Step 6: Final answer
    x = 1,485.02

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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.