Home / 1,486.50-2,229.78-390.96

Finding the Fourth Proportional to 1,486.50, 2,229.78 and 390.96

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Solution

The fourth proportional to 1,486.50, 2,229.78 and 390.96 is: 586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.50 : 2,229.78 = 390.96 : x
  2. Step 2: Convert to fraction form
    1,486.50/2,229.78 = 390.96/x
  3. Step 3: Cross multiply
    1,486.50x = 2,229.78 × 390.96
  4. Step 4: Simplify right side
    1,486.50x = 871,754.79
  5. Step 5: Solve for x
    x = 871,754.79/1,486.50
  6. Step 6: Final answer
    x = 586.45

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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.