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Finding the Fourth Proportional to 365.40, 503.78 and 260.61

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Solution

The fourth proportional to 365.40, 503.78 and 260.61 is: 359.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.40 : 503.78 = 260.61 : x
  2. Step 2: Convert to fraction form
    365.40/503.78 = 260.61/x
  3. Step 3: Cross multiply
    365.40x = 503.78 × 260.61
  4. Step 4: Simplify right side
    365.40x = 131,290.11
  5. Step 5: Solve for x
    x = 131,290.11/365.40
  6. Step 6: Final answer
    x = 359.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.