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Finding the Fourth Proportional to 631.67, 953.20 and 608.79

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Solution

The fourth proportional to 631.67, 953.20 and 608.79 is: 918.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.67 : 953.20 = 608.79 : x
  2. Step 2: Convert to fraction form
    631.67/953.20 = 608.79/x
  3. Step 3: Cross multiply
    631.67x = 953.20 × 608.79
  4. Step 4: Simplify right side
    631.67x = 580,295.58
  5. Step 5: Solve for x
    x = 580,295.58/631.67
  6. Step 6: Final answer
    x = 918.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.