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Finding the Fourth Proportional to 773.91, 1,068.09 and 479.27

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Solution

The fourth proportional to 773.91, 1,068.09 and 479.27 is: 661.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.91 : 1,068.09 = 479.27 : x
  2. Step 2: Convert to fraction form
    773.91/1,068.09 = 479.27/x
  3. Step 3: Cross multiply
    773.91x = 1,068.09 × 479.27
  4. Step 4: Simplify right side
    773.91x = 511,903.49
  5. Step 5: Solve for x
    x = 511,903.49/773.91
  6. Step 6: Final answer
    x = 661.45

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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.