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Finding the Fourth Proportional to 503.98, 755.98 and 260.38

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Solution

The fourth proportional to 503.98, 755.98 and 260.38 is: 390.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.98 : 755.98 = 260.38 : x
  2. Step 2: Convert to fraction form
    503.98/755.98 = 260.38/x
  3. Step 3: Cross multiply
    503.98x = 755.98 × 260.38
  4. Step 4: Simplify right side
    503.98x = 196,842.07
  5. Step 5: Solve for x
    x = 196,842.07/503.98
  6. Step 6: Final answer
    x = 390.58

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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.