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Finding the Fourth Proportional to 3,914.08, 5,870.90 and 992.20

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Solution

The fourth proportional to 3,914.08, 5,870.90 and 992.20 is: 1,488.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,914.08 : 5,870.90 = 992.20 : x
  2. Step 2: Convert to fraction form
    3,914.08/5,870.90 = 992.20/x
  3. Step 3: Cross multiply
    3,914.08x = 5,870.90 × 992.20
  4. Step 4: Simplify right side
    3,914.08x = 5,825,106.98
  5. Step 5: Solve for x
    x = 5,825,106.98/3,914.08
  6. Step 6: Final answer
    x = 1,488.24

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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.