Home / 3,587.10-5,380.65-990.05

Finding the Fourth Proportional to 3,587.10, 5,380.65 and 990.05

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Solution

The fourth proportional to 3,587.10, 5,380.65 and 990.05 is: 1,485.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.10 : 5,380.65 = 990.05 : x
  2. Step 2: Convert to fraction form
    3,587.10/5,380.65 = 990.05/x
  3. Step 3: Cross multiply
    3,587.10x = 5,380.65 × 990.05
  4. Step 4: Simplify right side
    3,587.10x = 5,327,085.63
  5. Step 5: Solve for x
    x = 5,327,085.63/3,587.10
  6. Step 6: Final answer
    x = 1,485.07

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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.