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Finding the Fourth Proportional to 380.72, 570 and 302.96

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Solution

The fourth proportional to 380.72, 570 and 302.96 is: 453.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.72 : 570 = 302.96 : x
  2. Step 2: Convert to fraction form
    380.72/570 = 302.96/x
  3. Step 3: Cross multiply
    380.72x = 570 × 302.96
  4. Step 4: Simplify right side
    380.72x = 172,687.20
  5. Step 5: Solve for x
    x = 172,687.20/380.72
  6. Step 6: Final answer
    x = 453.58

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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.