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Finding the Fourth Proportional to 2,568.54, 3,852.80 and 620.74

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Solution

The fourth proportional to 2,568.54, 3,852.80 and 620.74 is: 931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,568.54 : 3,852.80 = 620.74 : x
  2. Step 2: Convert to fraction form
    2,568.54/3,852.80 = 620.74/x
  3. Step 3: Cross multiply
    2,568.54x = 3,852.80 × 620.74
  4. Step 4: Simplify right side
    2,568.54x = 2,391,587.07
  5. Step 5: Solve for x
    x = 2,391,587.07/2,568.54
  6. Step 6: Final answer
    x = 931.11

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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.