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Finding the Fourth Proportional to 4,975.74, 6,864.57 and 2,879.46

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Solution

The fourth proportional to 4,975.74, 6,864.57 and 2,879.46 is: 3,972.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,975.74 : 6,864.57 = 2,879.46 : x
  2. Step 2: Convert to fraction form
    4,975.74/6,864.57 = 2,879.46/x
  3. Step 3: Cross multiply
    4,975.74x = 6,864.57 × 2,879.46
  4. Step 4: Simplify right side
    4,975.74x = 19,766,254.73
  5. Step 5: Solve for x
    x = 19,766,254.73/4,975.74
  6. Step 6: Final answer
    x = 3,972.53

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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.