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Finding the Fourth Proportional to 305.02, 455.30 and 268.57

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Solution

The fourth proportional to 305.02, 455.30 and 268.57 is: 400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.02 : 455.30 = 268.57 : x
  2. Step 2: Convert to fraction form
    305.02/455.30 = 268.57/x
  3. Step 3: Cross multiply
    305.02x = 455.30 × 268.57
  4. Step 4: Simplify right side
    305.02x = 122,279.92
  5. Step 5: Solve for x
    x = 122,279.92/305.02
  6. Step 6: Final answer
    x = 400.89

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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.