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Finding the Fourth Proportional to 758.98, 1,138.51 and 239.00

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Solution

The fourth proportional to 758.98, 1,138.51 and 239.00 is: 358.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.98 : 1,138.51 = 239.00 : x
  2. Step 2: Convert to fraction form
    758.98/1,138.51 = 239.00/x
  3. Step 3: Cross multiply
    758.98x = 1,138.51 × 239.00
  4. Step 4: Simplify right side
    758.98x = 272,098.50
  5. Step 5: Solve for x
    x = 272,098.50/758.98
  6. Step 6: Final answer
    x = 358.50

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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.