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Finding the Fourth Proportional to 705.36, 1,056.33 and 379.92

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Solution

The fourth proportional to 705.36, 1,056.33 and 379.92 is: 568.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.36 : 1,056.33 = 379.92 : x
  2. Step 2: Convert to fraction form
    705.36/1,056.33 = 379.92/x
  3. Step 3: Cross multiply
    705.36x = 1,056.33 × 379.92
  4. Step 4: Simplify right side
    705.36x = 401,320.89
  5. Step 5: Solve for x
    x = 401,320.89/705.36
  6. Step 6: Final answer
    x = 568.96

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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.