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Finding the Fourth Proportional to 585.36, 878.67 and 520.77

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Solution

The fourth proportional to 585.36, 878.67 and 520.77 is: 781.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.36 : 878.67 = 520.77 : x
  2. Step 2: Convert to fraction form
    585.36/878.67 = 520.77/x
  3. Step 3: Cross multiply
    585.36x = 878.67 × 520.77
  4. Step 4: Simplify right side
    585.36x = 457,584.98
  5. Step 5: Solve for x
    x = 457,584.98/585.36
  6. Step 6: Final answer
    x = 781.72

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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.