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Finding the Fourth Proportional to 2,120.46, 3,180.69 and 581.46

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Solution

The fourth proportional to 2,120.46, 3,180.69 and 581.46 is: 872.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.46 : 3,180.69 = 581.46 : x
  2. Step 2: Convert to fraction form
    2,120.46/3,180.69 = 581.46/x
  3. Step 3: Cross multiply
    2,120.46x = 3,180.69 × 581.46
  4. Step 4: Simplify right side
    2,120.46x = 1,849,444.01
  5. Step 5: Solve for x
    x = 1,849,444.01/2,120.46
  6. Step 6: Final answer
    x = 872.19

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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.