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Finding the Fourth Proportional to 369.99, 555.18 and 126.57

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Solution

The fourth proportional to 369.99, 555.18 and 126.57 is: 189.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.99 : 555.18 = 126.57 : x
  2. Step 2: Convert to fraction form
    369.99/555.18 = 126.57/x
  3. Step 3: Cross multiply
    369.99x = 555.18 × 126.57
  4. Step 4: Simplify right side
    369.99x = 70,269.13
  5. Step 5: Solve for x
    x = 70,269.13/369.99
  6. Step 6: Final answer
    x = 189.92

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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.