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Finding the Fourth Proportional to 637.46, 955.71 and 431.49

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Solution

The fourth proportional to 637.46, 955.71 and 431.49 is: 646.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.46 : 955.71 = 431.49 : x
  2. Step 2: Convert to fraction form
    637.46/955.71 = 431.49/x
  3. Step 3: Cross multiply
    637.46x = 955.71 × 431.49
  4. Step 4: Simplify right side
    637.46x = 412,379.31
  5. Step 5: Solve for x
    x = 412,379.31/637.46
  6. Step 6: Final answer
    x = 646.92

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.