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Finding the Fourth Proportional to 528.58, 790.07 and 517.65

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Solution

The fourth proportional to 528.58, 790.07 and 517.65 is: 773.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.58 : 790.07 = 517.65 : x
  2. Step 2: Convert to fraction form
    528.58/790.07 = 517.65/x
  3. Step 3: Cross multiply
    528.58x = 790.07 × 517.65
  4. Step 4: Simplify right side
    528.58x = 408,979.74
  5. Step 5: Solve for x
    x = 408,979.74/528.58
  6. Step 6: Final answer
    x = 773.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.