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Finding the Fourth Proportional to 715.95, 1,073.21 and 351.27

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Solution

The fourth proportional to 715.95, 1,073.21 and 351.27 is: 526.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.95 : 1,073.21 = 351.27 : x
  2. Step 2: Convert to fraction form
    715.95/1,073.21 = 351.27/x
  3. Step 3: Cross multiply
    715.95x = 1,073.21 × 351.27
  4. Step 4: Simplify right side
    715.95x = 376,984.72
  5. Step 5: Solve for x
    x = 376,984.72/715.95
  6. Step 6: Final answer
    x = 526.55

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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.