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Finding the Fourth Proportional to 705.17, 1,057.85 and 358.39

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Solution

The fourth proportional to 705.17, 1,057.85 and 358.39 is: 537.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.17 : 1,057.85 = 358.39 : x
  2. Step 2: Convert to fraction form
    705.17/1,057.85 = 358.39/x
  3. Step 3: Cross multiply
    705.17x = 1,057.85 × 358.39
  4. Step 4: Simplify right side
    705.17x = 379,115.78
  5. Step 5: Solve for x
    x = 379,115.78/705.17
  6. Step 6: Final answer
    x = 537.62

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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.