Home / 1,119.90-1,680.24-339.96

Finding the Fourth Proportional to 1,119.90, 1,680.24 and 339.96

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Solution

The fourth proportional to 1,119.90, 1,680.24 and 339.96 is: 510.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.90 : 1,680.24 = 339.96 : x
  2. Step 2: Convert to fraction form
    1,119.90/1,680.24 = 339.96/x
  3. Step 3: Cross multiply
    1,119.90x = 1,680.24 × 339.96
  4. Step 4: Simplify right side
    1,119.90x = 571,214.39
  5. Step 5: Solve for x
    x = 571,214.39/1,119.90
  6. Step 6: Final answer
    x = 510.06

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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.