Home / 2,987.58-4,480.20-1,138.08

Finding the Fourth Proportional to 2,987.58, 4,480.20 and 1,138.08

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Solution

The fourth proportional to 2,987.58, 4,480.20 and 1,138.08 is: 1,706.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.58 : 4,480.20 = 1,138.08 : x
  2. Step 2: Convert to fraction form
    2,987.58/4,480.20 = 1,138.08/x
  3. Step 3: Cross multiply
    2,987.58x = 4,480.20 × 1,138.08
  4. Step 4: Simplify right side
    2,987.58x = 5,098,826.02
  5. Step 5: Solve for x
    x = 5,098,826.02/2,987.58
  6. Step 6: Final answer
    x = 1,706.67

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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.