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Finding the Fourth Proportional to 697.36, 1,044.60 and 479.92

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Solution

The fourth proportional to 697.36, 1,044.60 and 479.92 is: 718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.36 : 1,044.60 = 479.92 : x
  2. Step 2: Convert to fraction form
    697.36/1,044.60 = 479.92/x
  3. Step 3: Cross multiply
    697.36x = 1,044.60 × 479.92
  4. Step 4: Simplify right side
    697.36x = 501,324.43
  5. Step 5: Solve for x
    x = 501,324.43/697.36
  6. Step 6: Final answer
    x = 718.89

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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.