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Finding the Fourth Proportional to 587.12, 879.15 and 312.59

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Solution

The fourth proportional to 587.12, 879.15 and 312.59 is: 468.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.12 : 879.15 = 312.59 : x
  2. Step 2: Convert to fraction form
    587.12/879.15 = 312.59/x
  3. Step 3: Cross multiply
    587.12x = 879.15 × 312.59
  4. Step 4: Simplify right side
    587.12x = 274,816.87
  5. Step 5: Solve for x
    x = 274,816.87/587.12
  6. Step 6: Final answer
    x = 468.08

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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.