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Finding the Fourth Proportional to 518.64, 781.86 and 483.39

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Solution

The fourth proportional to 518.64, 781.86 and 483.39 is: 728.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.64 : 781.86 = 483.39 : x
  2. Step 2: Convert to fraction form
    518.64/781.86 = 483.39/x
  3. Step 3: Cross multiply
    518.64x = 781.86 × 483.39
  4. Step 4: Simplify right side
    518.64x = 377,943.31
  5. Step 5: Solve for x
    x = 377,943.31/518.64
  6. Step 6: Final answer
    x = 728.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.