Home / 3,221.20-4,827.72-1,902.40

Finding the Fourth Proportional to 3,221.20, 4,827.72 and 1,902.40

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Solution

The fourth proportional to 3,221.20, 4,827.72 and 1,902.40 is: 2,851.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.20 : 4,827.72 = 1,902.40 : x
  2. Step 2: Convert to fraction form
    3,221.20/4,827.72 = 1,902.40/x
  3. Step 3: Cross multiply
    3,221.20x = 4,827.72 × 1,902.40
  4. Step 4: Simplify right side
    3,221.20x = 9,184,254.53
  5. Step 5: Solve for x
    x = 9,184,254.53/3,221.20
  6. Step 6: Final answer
    x = 2,851.19

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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.