Home / 1,218.45-1,826.65-487.63

Finding the Fourth Proportional to 1,218.45, 1,826.65 and 487.63

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Solution

The fourth proportional to 1,218.45, 1,826.65 and 487.63 is: 731.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.45 : 1,826.65 = 487.63 : x
  2. Step 2: Convert to fraction form
    1,218.45/1,826.65 = 487.63/x
  3. Step 3: Cross multiply
    1,218.45x = 1,826.65 × 487.63
  4. Step 4: Simplify right side
    1,218.45x = 890,718.99
  5. Step 5: Solve for x
    x = 890,718.99/1,218.45
  6. Step 6: Final answer
    x = 731.03

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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.