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Finding the Fourth Proportional to 585.72, 879.78 and 380.64

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Solution

The fourth proportional to 585.72, 879.78 and 380.64 is: 571.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.72 : 879.78 = 380.64 : x
  2. Step 2: Convert to fraction form
    585.72/879.78 = 380.64/x
  3. Step 3: Cross multiply
    585.72x = 879.78 × 380.64
  4. Step 4: Simplify right side
    585.72x = 334,879.46
  5. Step 5: Solve for x
    x = 334,879.46/585.72
  6. Step 6: Final answer
    x = 571.74

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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.