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Finding the Fourth Proportional to 575.35, 793.55 and 388.55

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Solution

The fourth proportional to 575.35, 793.55 and 388.55 is: 535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.35 : 793.55 = 388.55 : x
  2. Step 2: Convert to fraction form
    575.35/793.55 = 388.55/x
  3. Step 3: Cross multiply
    575.35x = 793.55 × 388.55
  4. Step 4: Simplify right side
    575.35x = 308,330.16
  5. Step 5: Solve for x
    x = 308,330.16/575.35
  6. Step 6: Final answer
    x = 535.90

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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.