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Finding the Fourth Proportional to 677.79, 934.61 and 481.77

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Solution

The fourth proportional to 677.79, 934.61 and 481.77 is: 664.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.79 : 934.61 = 481.77 : x
  2. Step 2: Convert to fraction form
    677.79/934.61 = 481.77/x
  3. Step 3: Cross multiply
    677.79x = 934.61 × 481.77
  4. Step 4: Simplify right side
    677.79x = 450,264.65
  5. Step 5: Solve for x
    x = 450,264.65/677.79
  6. Step 6: Final answer
    x = 664.31

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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.