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Finding the Fourth Proportional to 715.70, 1,073.69 and 350.49

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Solution

The fourth proportional to 715.70, 1,073.69 and 350.49 is: 525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.70 : 1,073.69 = 350.49 : x
  2. Step 2: Convert to fraction form
    715.70/1,073.69 = 350.49/x
  3. Step 3: Cross multiply
    715.70x = 1,073.69 × 350.49
  4. Step 4: Simplify right side
    715.70x = 376,317.61
  5. Step 5: Solve for x
    x = 376,317.61/715.70
  6. Step 6: Final answer
    x = 525.80

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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.