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Finding the Fourth Proportional to 697.79, 962.63 and 449.02

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Solution

The fourth proportional to 697.79, 962.63 and 449.02 is: 619.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.79 : 962.63 = 449.02 : x
  2. Step 2: Convert to fraction form
    697.79/962.63 = 449.02/x
  3. Step 3: Cross multiply
    697.79x = 962.63 × 449.02
  4. Step 4: Simplify right side
    697.79x = 432,235.47
  5. Step 5: Solve for x
    x = 432,235.47/697.79
  6. Step 6: Final answer
    x = 619.44

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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.