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Finding the Fourth Proportional to 1,585.50, 2,379.33 and 559.50

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Solution

The fourth proportional to 1,585.50, 2,379.33 and 559.50 is: 839.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.50 : 2,379.33 = 559.50 : x
  2. Step 2: Convert to fraction form
    1,585.50/2,379.33 = 559.50/x
  3. Step 3: Cross multiply
    1,585.50x = 2,379.33 × 559.50
  4. Step 4: Simplify right side
    1,585.50x = 1,331,235.14
  5. Step 5: Solve for x
    x = 1,331,235.14/1,585.50
  6. Step 6: Final answer
    x = 839.63

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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.