Home / 3,587.22-5,381.20-990.16

Finding the Fourth Proportional to 3,587.22, 5,381.20 and 990.16

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Solution

The fourth proportional to 3,587.22, 5,381.20 and 990.16 is: 1,485.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.22 : 5,381.20 = 990.16 : x
  2. Step 2: Convert to fraction form
    3,587.22/5,381.20 = 990.16/x
  3. Step 3: Cross multiply
    3,587.22x = 5,381.20 × 990.16
  4. Step 4: Simplify right side
    3,587.22x = 5,328,236.78
  5. Step 5: Solve for x
    x = 5,328,236.78/3,587.22
  6. Step 6: Final answer
    x = 1,485.34

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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.