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Finding the Fourth Proportional to 305.30, 455.27 and 302.57

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Solution

The fourth proportional to 305.30, 455.27 and 302.57 is: 451.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.30 : 455.27 = 302.57 : x
  2. Step 2: Convert to fraction form
    305.30/455.27 = 302.57/x
  3. Step 3: Cross multiply
    305.30x = 455.27 × 302.57
  4. Step 4: Simplify right side
    305.30x = 137,751.04
  5. Step 5: Solve for x
    x = 137,751.04/305.30
  6. Step 6: Final answer
    x = 451.20

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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.