Home / 2,912.10-4,368.10-720.83

Finding the Fourth Proportional to 2,912.10, 4,368.10 and 720.83

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Solution

The fourth proportional to 2,912.10, 4,368.10 and 720.83 is: 1,081.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.10 : 4,368.10 = 720.83 : x
  2. Step 2: Convert to fraction form
    2,912.10/4,368.10 = 720.83/x
  3. Step 3: Cross multiply
    2,912.10x = 4,368.10 × 720.83
  4. Step 4: Simplify right side
    2,912.10x = 3,148,657.52
  5. Step 5: Solve for x
    x = 3,148,657.52/2,912.10
  6. Step 6: Final answer
    x = 1,081.23

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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.