Home / 2,151.40-3,226.30-918.93

Finding the Fourth Proportional to 2,151.40, 3,226.30 and 918.93

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Solution

The fourth proportional to 2,151.40, 3,226.30 and 918.93 is: 1,378.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.40 : 3,226.30 = 918.93 : x
  2. Step 2: Convert to fraction form
    2,151.40/3,226.30 = 918.93/x
  3. Step 3: Cross multiply
    2,151.40x = 3,226.30 × 918.93
  4. Step 4: Simplify right side
    2,151.40x = 2,964,743.86
  5. Step 5: Solve for x
    x = 2,964,743.86/2,151.40
  6. Step 6: Final answer
    x = 1,378.05

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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.