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Finding the Fourth Proportional to 369.42, 555.12 and 207.24

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Solution

The fourth proportional to 369.42, 555.12 and 207.24 is: 311.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.42 : 555.12 = 207.24 : x
  2. Step 2: Convert to fraction form
    369.42/555.12 = 207.24/x
  3. Step 3: Cross multiply
    369.42x = 555.12 × 207.24
  4. Step 4: Simplify right side
    369.42x = 115,043.07
  5. Step 5: Solve for x
    x = 115,043.07/369.42
  6. Step 6: Final answer
    x = 311.42

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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.