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Finding the Fourth Proportional to 641.99, 886.04 and 475.94

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Solution

The fourth proportional to 641.99, 886.04 and 475.94 is: 656.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.99 : 886.04 = 475.94 : x
  2. Step 2: Convert to fraction form
    641.99/886.04 = 475.94/x
  3. Step 3: Cross multiply
    641.99x = 886.04 × 475.94
  4. Step 4: Simplify right side
    641.99x = 421,703.50
  5. Step 5: Solve for x
    x = 421,703.50/641.99
  6. Step 6: Final answer
    x = 656.87

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