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Finding the Fourth Proportional to 758.88, 1,138.88 and 585.98

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Solution

The fourth proportional to 758.88, 1,138.88 and 585.98 is: 879.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.88 : 1,138.88 = 585.98 : x
  2. Step 2: Convert to fraction form
    758.88/1,138.88 = 585.98/x
  3. Step 3: Cross multiply
    758.88x = 1,138.88 × 585.98
  4. Step 4: Simplify right side
    758.88x = 667,352.28
  5. Step 5: Solve for x
    x = 667,352.28/758.88
  6. Step 6: Final answer
    x = 879.39

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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.