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Finding the Fourth Proportional to 697.61, 1,044.50 and 423.02

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Solution

The fourth proportional to 697.61, 1,044.50 and 423.02 is: 633.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.61 : 1,044.50 = 423.02 : x
  2. Step 2: Convert to fraction form
    697.61/1,044.50 = 423.02/x
  3. Step 3: Cross multiply
    697.61x = 1,044.50 × 423.02
  4. Step 4: Simplify right side
    697.61x = 441,844.89
  5. Step 5: Solve for x
    x = 441,844.89/697.61
  6. Step 6: Final answer
    x = 633.37

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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.