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Finding the Fourth Proportional to 697.99, 963.26 and 387.49

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Solution

The fourth proportional to 697.99, 963.26 and 387.49 is: 534.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.99 : 963.26 = 387.49 : x
  2. Step 2: Convert to fraction form
    697.99/963.26 = 387.49/x
  3. Step 3: Cross multiply
    697.99x = 963.26 × 387.49
  4. Step 4: Simplify right side
    697.99x = 373,253.62
  5. Step 5: Solve for x
    x = 373,253.62/697.99
  6. Step 6: Final answer
    x = 534.75

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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.