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Finding the Fourth Proportional to 693.42, 957.87 and 688.56

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Solution

The fourth proportional to 693.42, 957.87 and 688.56 is: 951.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.42 : 957.87 = 688.56 : x
  2. Step 2: Convert to fraction form
    693.42/957.87 = 688.56/x
  3. Step 3: Cross multiply
    693.42x = 957.87 × 688.56
  4. Step 4: Simplify right side
    693.42x = 659,550.97
  5. Step 5: Solve for x
    x = 659,550.97/693.42
  6. Step 6: Final answer
    x = 951.16

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1.5x scale

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.