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Finding the Fourth Proportional to 779.94, 1,076.29 and 425.87

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Solution

The fourth proportional to 779.94, 1,076.29 and 425.87 is: 587.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.94 : 1,076.29 = 425.87 : x
  2. Step 2: Convert to fraction form
    779.94/1,076.29 = 425.87/x
  3. Step 3: Cross multiply
    779.94x = 1,076.29 × 425.87
  4. Step 4: Simplify right side
    779.94x = 458,354.19
  5. Step 5: Solve for x
    x = 458,354.19/779.94
  6. Step 6: Final answer
    x = 587.68

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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.