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Finding the Fourth Proportional to 528.66, 796.10 and 392.72

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Solution

The fourth proportional to 528.66, 796.10 and 392.72 is: 591.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.66 : 796.10 = 392.72 : x
  2. Step 2: Convert to fraction form
    528.66/796.10 = 392.72/x
  3. Step 3: Cross multiply
    528.66x = 796.10 × 392.72
  4. Step 4: Simplify right side
    528.66x = 312,638.45
  5. Step 5: Solve for x
    x = 312,638.45/528.66
  6. Step 6: Final answer
    x = 591.38

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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.