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Finding the Fourth Proportional to 632.49, 872.60 and 383.64

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Solution

The fourth proportional to 632.49, 872.60 and 383.64 is: 529.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.49 : 872.60 = 383.64 : x
  2. Step 2: Convert to fraction form
    632.49/872.60 = 383.64/x
  3. Step 3: Cross multiply
    632.49x = 872.60 × 383.64
  4. Step 4: Simplify right side
    632.49x = 334,762.35
  5. Step 5: Solve for x
    x = 334,762.35/632.49
  6. Step 6: Final answer
    x = 529.28

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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.