Home / 1,550.08-2,138.39-990.27

Finding the Fourth Proportional to 1,550.08, 2,138.39 and 990.27

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Solution

The fourth proportional to 1,550.08, 2,138.39 and 990.27 is: 1,366.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.08 : 2,138.39 = 990.27 : x
  2. Step 2: Convert to fraction form
    1,550.08/2,138.39 = 990.27/x
  3. Step 3: Cross multiply
    1,550.08x = 2,138.39 × 990.27
  4. Step 4: Simplify right side
    1,550.08x = 2,117,583.47
  5. Step 5: Solve for x
    x = 2,117,583.47/1,550.08
  6. Step 6: Final answer
    x = 1,366.11

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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.