Home / 2,154.58-3,228.83-981.70

Finding the Fourth Proportional to 2,154.58, 3,228.83 and 981.70

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Solution

The fourth proportional to 2,154.58, 3,228.83 and 981.70 is: 1,471.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.58 : 3,228.83 = 981.70 : x
  2. Step 2: Convert to fraction form
    2,154.58/3,228.83 = 981.70/x
  3. Step 3: Cross multiply
    2,154.58x = 3,228.83 × 981.70
  4. Step 4: Simplify right side
    2,154.58x = 3,169,733.11
  5. Step 5: Solve for x
    x = 3,169,733.11/2,154.58
  6. Step 6: Final answer
    x = 1,471.16

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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.