Home / 2,913.20-4,020.88-1,903.12

Finding the Fourth Proportional to 2,913.20, 4,020.88 and 1,903.12

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Solution

The fourth proportional to 2,913.20, 4,020.88 and 1,903.12 is: 2,626.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.20 : 4,020.88 = 1,903.12 : x
  2. Step 2: Convert to fraction form
    2,913.20/4,020.88 = 1,903.12/x
  3. Step 3: Cross multiply
    2,913.20x = 4,020.88 × 1,903.12
  4. Step 4: Simplify right side
    2,913.20x = 7,652,217.15
  5. Step 5: Solve for x
    x = 7,652,217.15/2,913.20
  6. Step 6: Final answer
    x = 2,626.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.