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Finding the Fourth Proportional to 697.84, 1,046.96 and 286.99

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Solution

The fourth proportional to 697.84, 1,046.96 and 286.99 is: 430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.84 : 1,046.96 = 286.99 : x
  2. Step 2: Convert to fraction form
    697.84/1,046.96 = 286.99/x
  3. Step 3: Cross multiply
    697.84x = 1,046.96 × 286.99
  4. Step 4: Simplify right side
    697.84x = 300,467.05
  5. Step 5: Solve for x
    x = 300,467.05/697.84
  6. Step 6: Final answer
    x = 430.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.