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Finding the Fourth Proportional to 697.44, 1,046.40 and 307.32

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Solution

The fourth proportional to 697.44, 1,046.40 and 307.32 is: 461.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.44 : 1,046.40 = 307.32 : x
  2. Step 2: Convert to fraction form
    697.44/1,046.40 = 307.32/x
  3. Step 3: Cross multiply
    697.44x = 1,046.40 × 307.32
  4. Step 4: Simplify right side
    697.44x = 321,579.65
  5. Step 5: Solve for x
    x = 321,579.65/697.44
  6. Step 6: Final answer
    x = 461.09

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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.