Home / 2,151.27-3,226.91-918.45

Finding the Fourth Proportional to 2,151.27, 3,226.91 and 918.45

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Solution

The fourth proportional to 2,151.27, 3,226.91 and 918.45 is: 1,377.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.27 : 3,226.91 = 918.45 : x
  2. Step 2: Convert to fraction form
    2,151.27/3,226.91 = 918.45/x
  3. Step 3: Cross multiply
    2,151.27x = 3,226.91 × 918.45
  4. Step 4: Simplify right side
    2,151.27x = 2,963,750.90
  5. Step 5: Solve for x
    x = 2,963,750.90/2,151.27
  6. Step 6: Final answer
    x = 1,377.68

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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.