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Finding the Fourth Proportional to 451.37, 672.26 and 431.37

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Solution

The fourth proportional to 451.37, 672.26 and 431.37 is: 642.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.37 : 672.26 = 431.37 : x
  2. Step 2: Convert to fraction form
    451.37/672.26 = 431.37/x
  3. Step 3: Cross multiply
    451.37x = 672.26 × 431.37
  4. Step 4: Simplify right side
    451.37x = 289,992.80
  5. Step 5: Solve for x
    x = 289,992.80/451.37
  6. Step 6: Final answer
    x = 642.47

Related Problems

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Double scale
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1.5x scale

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.