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Finding the Fourth Proportional to 505.47, 697.82 and 354.52

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Solution

The fourth proportional to 505.47, 697.82 and 354.52 is: 489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.47 : 697.82 = 354.52 : x
  2. Step 2: Convert to fraction form
    505.47/697.82 = 354.52/x
  3. Step 3: Cross multiply
    505.47x = 697.82 × 354.52
  4. Step 4: Simplify right side
    505.47x = 247,388.64
  5. Step 5: Solve for x
    x = 247,388.64/505.47
  6. Step 6: Final answer
    x = 489.43

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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.