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Finding the Fourth Proportional to 833.58, 1,247.62 and 742.45

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Solution

The fourth proportional to 833.58, 1,247.62 and 742.45 is: 1,111.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.58 : 1,247.62 = 742.45 : x
  2. Step 2: Convert to fraction form
    833.58/1,247.62 = 742.45/x
  3. Step 3: Cross multiply
    833.58x = 1,247.62 × 742.45
  4. Step 4: Simplify right side
    833.58x = 926,295.47
  5. Step 5: Solve for x
    x = 926,295.47/833.58
  6. Step 6: Final answer
    x = 1,111.23

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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.