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Finding the Fourth Proportional to 574.08, 792.59 and 387.60

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Solution

The fourth proportional to 574.08, 792.59 and 387.60 is: 535.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.08 : 792.59 = 387.60 : x
  2. Step 2: Convert to fraction form
    574.08/792.59 = 387.60/x
  3. Step 3: Cross multiply
    574.08x = 792.59 × 387.60
  4. Step 4: Simplify right side
    574.08x = 307,205.95
  5. Step 5: Solve for x
    x = 307,205.95/574.08
  6. Step 6: Final answer
    x = 535.13

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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.