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Finding the Fourth Proportional to 2,635.20, 3,953.34 and 992.16

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Solution

The fourth proportional to 2,635.20, 3,953.34 and 992.16 is: 1,488.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,635.20 : 3,953.34 = 992.16 : x
  2. Step 2: Convert to fraction form
    2,635.20/3,953.34 = 992.16/x
  3. Step 3: Cross multiply
    2,635.20x = 3,953.34 × 992.16
  4. Step 4: Simplify right side
    2,635.20x = 3,922,345.81
  5. Step 5: Solve for x
    x = 3,922,345.81/2,635.20
  6. Step 6: Final answer
    x = 1,488.44

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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.