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Finding the Fourth Proportional to 2,837.31, 4,255.98 and 989.74

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Solution

The fourth proportional to 2,837.31, 4,255.98 and 989.74 is: 1,484.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,837.31 : 4,255.98 = 989.74 : x
  2. Step 2: Convert to fraction form
    2,837.31/4,255.98 = 989.74/x
  3. Step 3: Cross multiply
    2,837.31x = 4,255.98 × 989.74
  4. Step 4: Simplify right side
    2,837.31x = 4,212,313.65
  5. Step 5: Solve for x
    x = 4,212,313.65/2,837.31
  6. Step 6: Final answer
    x = 1,484.62

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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.