Home / 1,217.77-1,828.01-487.85

Finding the Fourth Proportional to 1,217.77, 1,828.01 and 487.85

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Solution

The fourth proportional to 1,217.77, 1,828.01 and 487.85 is: 732.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.77 : 1,828.01 = 487.85 : x
  2. Step 2: Convert to fraction form
    1,217.77/1,828.01 = 487.85/x
  3. Step 3: Cross multiply
    1,217.77x = 1,828.01 × 487.85
  4. Step 4: Simplify right side
    1,217.77x = 891,786.76
  5. Step 5: Solve for x
    x = 891,786.76/1,217.77
  6. Step 6: Final answer
    x = 732.31

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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.