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Finding the Fourth Proportional to 655.56, 982.59 and 424.86

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Solution

The fourth proportional to 655.56, 982.59 and 424.86 is: 636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.56 : 982.59 = 424.86 : x
  2. Step 2: Convert to fraction form
    655.56/982.59 = 424.86/x
  3. Step 3: Cross multiply
    655.56x = 982.59 × 424.86
  4. Step 4: Simplify right side
    655.56x = 417,463.19
  5. Step 5: Solve for x
    x = 417,463.19/655.56
  6. Step 6: Final answer
    x = 636.80

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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.