Home / 1,129.40-1,694.38-359.90

Finding the Fourth Proportional to 1,129.40, 1,694.38 and 359.90

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Solution

The fourth proportional to 1,129.40, 1,694.38 and 359.90 is: 539.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.40 : 1,694.38 = 359.90 : x
  2. Step 2: Convert to fraction form
    1,129.40/1,694.38 = 359.90/x
  3. Step 3: Cross multiply
    1,129.40x = 1,694.38 × 359.90
  4. Step 4: Simplify right side
    1,129.40x = 609,807.36
  5. Step 5: Solve for x
    x = 609,807.36/1,129.40
  6. Step 6: Final answer
    x = 539.94

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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.