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Finding the Fourth Proportional to 833.62, 1,249.80 and 651.40

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Solution

The fourth proportional to 833.62, 1,249.80 and 651.40 is: 976.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.62 : 1,249.80 = 651.40 : x
  2. Step 2: Convert to fraction form
    833.62/1,249.80 = 651.40/x
  3. Step 3: Cross multiply
    833.62x = 1,249.80 × 651.40
  4. Step 4: Simplify right side
    833.62x = 814,119.72
  5. Step 5: Solve for x
    x = 814,119.72/833.62
  6. Step 6: Final answer
    x = 976.61

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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.