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Finding the Fourth Proportional to 661.75, 910.32 and 635.11

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Solution

The fourth proportional to 661.75, 910.32 and 635.11 is: 873.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.75 : 910.32 = 635.11 : x
  2. Step 2: Convert to fraction form
    661.75/910.32 = 635.11/x
  3. Step 3: Cross multiply
    661.75x = 910.32 × 635.11
  4. Step 4: Simplify right side
    661.75x = 578,153.34
  5. Step 5: Solve for x
    x = 578,153.34/661.75
  6. Step 6: Final answer
    x = 873.67

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Why These Related Problems?

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