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Finding the Fourth Proportional to 528.74, 791.04 and 354.58

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Solution

The fourth proportional to 528.74, 791.04 and 354.58 is: 530.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.74 : 791.04 = 354.58 : x
  2. Step 2: Convert to fraction form
    528.74/791.04 = 354.58/x
  3. Step 3: Cross multiply
    528.74x = 791.04 × 354.58
  4. Step 4: Simplify right side
    528.74x = 280,486.96
  5. Step 5: Solve for x
    x = 280,486.96/528.74
  6. Step 6: Final answer
    x = 530.48

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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.