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Finding the Fourth Proportional to 677.92, 1,015.92 and 353.44

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Solution

The fourth proportional to 677.92, 1,015.92 and 353.44 is: 529.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.92 : 1,015.92 = 353.44 : x
  2. Step 2: Convert to fraction form
    677.92/1,015.92 = 353.44/x
  3. Step 3: Cross multiply
    677.92x = 1,015.92 × 353.44
  4. Step 4: Simplify right side
    677.92x = 359,066.76
  5. Step 5: Solve for x
    x = 359,066.76/677.92
  6. Step 6: Final answer
    x = 529.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.