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Finding the Fourth Proportional to 369.18, 553.86 and 357.12

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Solution

The fourth proportional to 369.18, 553.86 and 357.12 is: 535.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.18 : 553.86 = 357.12 : x
  2. Step 2: Convert to fraction form
    369.18/553.86 = 357.12/x
  3. Step 3: Cross multiply
    369.18x = 553.86 × 357.12
  4. Step 4: Simplify right side
    369.18x = 197,794.48
  5. Step 5: Solve for x
    x = 197,794.48/369.18
  6. Step 6: Final answer
    x = 535.77

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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.