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Finding the Fourth Proportional to 655.15, 905.55 and 575.87

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Solution

The fourth proportional to 655.15, 905.55 and 575.87 is: 795.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.15 : 905.55 = 575.87 : x
  2. Step 2: Convert to fraction form
    655.15/905.55 = 575.87/x
  3. Step 3: Cross multiply
    655.15x = 905.55 × 575.87
  4. Step 4: Simplify right side
    655.15x = 521,479.08
  5. Step 5: Solve for x
    x = 521,479.08/655.15
  6. Step 6: Final answer
    x = 795.97

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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.