Home / 1,359.20-2,038.68-628.79

Finding the Fourth Proportional to 1,359.20, 2,038.68 and 628.79

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Solution

The fourth proportional to 1,359.20, 2,038.68 and 628.79 is: 943.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.20 : 2,038.68 = 628.79 : x
  2. Step 2: Convert to fraction form
    1,359.20/2,038.68 = 628.79/x
  3. Step 3: Cross multiply
    1,359.20x = 2,038.68 × 628.79
  4. Step 4: Simplify right side
    1,359.20x = 1,281,891.40
  5. Step 5: Solve for x
    x = 1,281,891.40/1,359.20
  6. Step 6: Final answer
    x = 943.12

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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.