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Finding the Fourth Proportional to 369.26, 553.28 and 260.83

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Solution

The fourth proportional to 369.26, 553.28 and 260.83 is: 390.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.26 : 553.28 = 260.83 : x
  2. Step 2: Convert to fraction form
    369.26/553.28 = 260.83/x
  3. Step 3: Cross multiply
    369.26x = 553.28 × 260.83
  4. Step 4: Simplify right side
    369.26x = 144,312.02
  5. Step 5: Solve for x
    x = 144,312.02/369.26
  6. Step 6: Final answer
    x = 390.81

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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.