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Finding the Fourth Proportional to 697.83, 962.87 and 449.09

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Solution

The fourth proportional to 697.83, 962.87 and 449.09 is: 619.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.83 : 962.87 = 449.09 : x
  2. Step 2: Convert to fraction form
    697.83/962.87 = 449.09/x
  3. Step 3: Cross multiply
    697.83x = 962.87 × 449.09
  4. Step 4: Simplify right side
    697.83x = 432,415.29
  5. Step 5: Solve for x
    x = 432,415.29/697.83
  6. Step 6: Final answer
    x = 619.66

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1.5x scale

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.