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Finding the Fourth Proportional to 305.78, 455.07 and 294.26

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Solution

The fourth proportional to 305.78, 455.07 and 294.26 is: 437.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.78 : 455.07 = 294.26 : x
  2. Step 2: Convert to fraction form
    305.78/455.07 = 294.26/x
  3. Step 3: Cross multiply
    305.78x = 455.07 × 294.26
  4. Step 4: Simplify right side
    305.78x = 133,907.43
  5. Step 5: Solve for x
    x = 133,907.43/305.78
  6. Step 6: Final answer
    x = 437.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.