Home / 1,162.40-1,743.32-392.90

Finding the Fourth Proportional to 1,162.40, 1,743.32 and 392.90

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Solution

The fourth proportional to 1,162.40, 1,743.32 and 392.90 is: 589.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.40 : 1,743.32 = 392.90 : x
  2. Step 2: Convert to fraction form
    1,162.40/1,743.32 = 392.90/x
  3. Step 3: Cross multiply
    1,162.40x = 1,743.32 × 392.90
  4. Step 4: Simplify right side
    1,162.40x = 684,942.69
  5. Step 5: Solve for x
    x = 684,942.69/1,162.40
  6. Step 6: Final answer
    x = 589.25

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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.