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Finding the Fourth Proportional to 677.54, 934.94 and 500.61

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Solution

The fourth proportional to 677.54, 934.94 and 500.61 is: 690.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.54 : 934.94 = 500.61 : x
  2. Step 2: Convert to fraction form
    677.54/934.94 = 500.61/x
  3. Step 3: Cross multiply
    677.54x = 934.94 × 500.61
  4. Step 4: Simplify right side
    677.54x = 468,040.31
  5. Step 5: Solve for x
    x = 468,040.31/677.54
  6. Step 6: Final answer
    x = 690.79

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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.