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Finding the Fourth Proportional to 512.55, 707.27 and 302.67

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Solution

The fourth proportional to 512.55, 707.27 and 302.67 is: 417.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.55 : 707.27 = 302.67 : x
  2. Step 2: Convert to fraction form
    512.55/707.27 = 302.67/x
  3. Step 3: Cross multiply
    512.55x = 707.27 × 302.67
  4. Step 4: Simplify right side
    512.55x = 214,067.90
  5. Step 5: Solve for x
    x = 214,067.90/512.55
  6. Step 6: Final answer
    x = 417.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.