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Finding the Fourth Proportional to 677.65, 935.21 and 382.95

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Solution

The fourth proportional to 677.65, 935.21 and 382.95 is: 528.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.65 : 935.21 = 382.95 : x
  2. Step 2: Convert to fraction form
    677.65/935.21 = 382.95/x
  3. Step 3: Cross multiply
    677.65x = 935.21 × 382.95
  4. Step 4: Simplify right side
    677.65x = 358,138.67
  5. Step 5: Solve for x
    x = 358,138.67/677.65
  6. Step 6: Final answer
    x = 528.50

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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.