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Finding the Fourth Proportional to 655.14, 981.33 and 448.74

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Solution

The fourth proportional to 655.14, 981.33 and 448.74 is: 672.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.14 : 981.33 = 448.74 : x
  2. Step 2: Convert to fraction form
    655.14/981.33 = 448.74/x
  3. Step 3: Cross multiply
    655.14x = 981.33 × 448.74
  4. Step 4: Simplify right side
    655.14x = 440,362.02
  5. Step 5: Solve for x
    x = 440,362.02/655.14
  6. Step 6: Final answer
    x = 672.16

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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.