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Finding the Fourth Proportional to 637.82, 956.05 and 417.75

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Solution

The fourth proportional to 637.82, 956.05 and 417.75 is: 626.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.82 : 956.05 = 417.75 : x
  2. Step 2: Convert to fraction form
    637.82/956.05 = 417.75/x
  3. Step 3: Cross multiply
    637.82x = 956.05 × 417.75
  4. Step 4: Simplify right side
    637.82x = 399,389.89
  5. Step 5: Solve for x
    x = 399,389.89/637.82
  6. Step 6: Final answer
    x = 626.18

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Double scale
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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.