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Finding the Fourth Proportional to 693.65, 958.95 and 687.57

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Solution

The fourth proportional to 693.65, 958.95 and 687.57 is: 950.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.65 : 958.95 = 687.57 : x
  2. Step 2: Convert to fraction form
    693.65/958.95 = 687.57/x
  3. Step 3: Cross multiply
    693.65x = 958.95 × 687.57
  4. Step 4: Simplify right side
    693.65x = 659,345.25
  5. Step 5: Solve for x
    x = 659,345.25/693.65
  6. Step 6: Final answer
    x = 950.55

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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.