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Finding the Fourth Proportional to 956.91, 1,320.12 and 583.83

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Solution

The fourth proportional to 956.91, 1,320.12 and 583.83 is: 805.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.91 : 1,320.12 = 583.83 : x
  2. Step 2: Convert to fraction form
    956.91/1,320.12 = 583.83/x
  3. Step 3: Cross multiply
    956.91x = 1,320.12 × 583.83
  4. Step 4: Simplify right side
    956.91x = 770,725.66
  5. Step 5: Solve for x
    x = 770,725.66/956.91
  6. Step 6: Final answer
    x = 805.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.