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Finding the Fourth Proportional to 587.15, 879.99 and 513.85

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Solution

The fourth proportional to 587.15, 879.99 and 513.85 is: 770.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.15 : 879.99 = 513.85 : x
  2. Step 2: Convert to fraction form
    587.15/879.99 = 513.85/x
  3. Step 3: Cross multiply
    587.15x = 879.99 × 513.85
  4. Step 4: Simplify right side
    587.15x = 452,182.86
  5. Step 5: Solve for x
    x = 452,182.86/587.15
  6. Step 6: Final answer
    x = 770.13

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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.