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Finding the Fourth Proportional to 632.41, 872.79 and 383.79

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Solution

The fourth proportional to 632.41, 872.79 and 383.79 is: 529.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.41 : 872.79 = 383.79 : x
  2. Step 2: Convert to fraction form
    632.41/872.79 = 383.79/x
  3. Step 3: Cross multiply
    632.41x = 872.79 × 383.79
  4. Step 4: Simplify right side
    632.41x = 334,963.71
  5. Step 5: Solve for x
    x = 334,963.71/632.41
  6. Step 6: Final answer
    x = 529.67

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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.