Home / 1,461.14-2,190.89-486.71

Finding the Fourth Proportional to 1,461.14, 2,190.89 and 486.71

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Solution

The fourth proportional to 1,461.14, 2,190.89 and 486.71 is: 729.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.14 : 2,190.89 = 486.71 : x
  2. Step 2: Convert to fraction form
    1,461.14/2,190.89 = 486.71/x
  3. Step 3: Cross multiply
    1,461.14x = 2,190.89 × 486.71
  4. Step 4: Simplify right side
    1,461.14x = 1,066,318.33
  5. Step 5: Solve for x
    x = 1,066,318.33/1,461.14
  6. Step 6: Final answer
    x = 729.79

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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.