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Finding the Fourth Proportional to 585.93, 879.12 and 312.21

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Solution

The fourth proportional to 585.93, 879.12 and 312.21 is: 468.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.93 : 879.12 = 312.21 : x
  2. Step 2: Convert to fraction form
    585.93/879.12 = 312.21/x
  3. Step 3: Cross multiply
    585.93x = 879.12 × 312.21
  4. Step 4: Simplify right side
    585.93x = 274,470.06
  5. Step 5: Solve for x
    x = 274,470.06/585.93
  6. Step 6: Final answer
    x = 468.43

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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.