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Finding the Fourth Proportional to 637.38, 955.53 and 431.37

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Solution

The fourth proportional to 637.38, 955.53 and 431.37 is: 646.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.38 : 955.53 = 431.37 : x
  2. Step 2: Convert to fraction form
    637.38/955.53 = 431.37/x
  3. Step 3: Cross multiply
    637.38x = 955.53 × 431.37
  4. Step 4: Simplify right side
    637.38x = 412,186.98
  5. Step 5: Solve for x
    x = 412,186.98/637.38
  6. Step 6: Final answer
    x = 646.69

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.