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Finding the Fourth Proportional to 706.87, 974.39 and 520.57

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Solution

The fourth proportional to 706.87, 974.39 and 520.57 is: 717.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.87 : 974.39 = 520.57 : x
  2. Step 2: Convert to fraction form
    706.87/974.39 = 520.57/x
  3. Step 3: Cross multiply
    706.87x = 974.39 × 520.57
  4. Step 4: Simplify right side
    706.87x = 507,238.20
  5. Step 5: Solve for x
    x = 507,238.20/706.87
  6. Step 6: Final answer
    x = 717.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.