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Finding the Fourth Proportional to 624.15, 935.82 and 315.54

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Solution

The fourth proportional to 624.15, 935.82 and 315.54 is: 473.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.15 : 935.82 = 315.54 : x
  2. Step 2: Convert to fraction form
    624.15/935.82 = 315.54/x
  3. Step 3: Cross multiply
    624.15x = 935.82 × 315.54
  4. Step 4: Simplify right side
    624.15x = 295,288.64
  5. Step 5: Solve for x
    x = 295,288.64/624.15
  6. Step 6: Final answer
    x = 473.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.