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Finding the Fourth Proportional to 612.96, 843.37 and 529.80

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Solution

The fourth proportional to 612.96, 843.37 and 529.80 is: 728.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.96 : 843.37 = 529.80 : x
  2. Step 2: Convert to fraction form
    612.96/843.37 = 529.80/x
  3. Step 3: Cross multiply
    612.96x = 843.37 × 529.80
  4. Step 4: Simplify right side
    612.96x = 446,817.43
  5. Step 5: Solve for x
    x = 446,817.43/612.96
  6. Step 6: Final answer
    x = 728.95

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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.