Home / 2,931.03-4,390.20-1,820.72

Finding the Fourth Proportional to 2,931.03, 4,390.20 and 1,820.72

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Solution

The fourth proportional to 2,931.03, 4,390.20 and 1,820.72 is: 2,727.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.03 : 4,390.20 = 1,820.72 : x
  2. Step 2: Convert to fraction form
    2,931.03/4,390.20 = 1,820.72/x
  3. Step 3: Cross multiply
    2,931.03x = 4,390.20 × 1,820.72
  4. Step 4: Simplify right side
    2,931.03x = 7,993,335.92
  5. Step 5: Solve for x
    x = 7,993,335.92/2,931.03
  6. Step 6: Final answer
    x = 2,727.14

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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.