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Finding the Fourth Proportional to 697.60, 954.74 and 690.31

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Solution

The fourth proportional to 697.60, 954.74 and 690.31 is: 944.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.60 : 954.74 = 690.31 : x
  2. Step 2: Convert to fraction form
    697.60/954.74 = 690.31/x
  3. Step 3: Cross multiply
    697.60x = 954.74 × 690.31
  4. Step 4: Simplify right side
    697.60x = 659,066.57
  5. Step 5: Solve for x
    x = 659,066.57/697.60
  6. Step 6: Final answer
    x = 944.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.