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Finding the Fourth Proportional to 4,990.91, 7,486.81 and 1,293.12

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Solution

The fourth proportional to 4,990.91, 7,486.81 and 1,293.12 is: 1,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.91 : 7,486.81 = 1,293.12 : x
  2. Step 2: Convert to fraction form
    4,990.91/7,486.81 = 1,293.12/x
  3. Step 3: Cross multiply
    4,990.91x = 7,486.81 × 1,293.12
  4. Step 4: Simplify right side
    4,990.91x = 9,681,340.51
  5. Step 5: Solve for x
    x = 9,681,340.51/4,990.91
  6. Step 6: Final answer
    x = 1,939.80

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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.