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Finding the Fourth Proportional to 505.50, 697.86 and 372.61

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Solution

The fourth proportional to 505.50, 697.86 and 372.61 is: 514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.50 : 697.86 = 372.61 : x
  2. Step 2: Convert to fraction form
    505.50/697.86 = 372.61/x
  3. Step 3: Cross multiply
    505.50x = 697.86 × 372.61
  4. Step 4: Simplify right side
    505.50x = 260,029.61
  5. Step 5: Solve for x
    x = 260,029.61/505.50
  6. Step 6: Final answer
    x = 514.40

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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.