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Finding the Fourth Proportional to 2,160.24, 3,239.88 and 620.88

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Solution

The fourth proportional to 2,160.24, 3,239.88 and 620.88 is: 931.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.24 : 3,239.88 = 620.88 : x
  2. Step 2: Convert to fraction form
    2,160.24/3,239.88 = 620.88/x
  3. Step 3: Cross multiply
    2,160.24x = 3,239.88 × 620.88
  4. Step 4: Simplify right side
    2,160.24x = 2,011,576.69
  5. Step 5: Solve for x
    x = 2,011,576.69/2,160.24
  6. Step 6: Final answer
    x = 931.18

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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.