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Finding the Fourth Proportional to 438.88, 656 and 383.68

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Solution

The fourth proportional to 438.88, 656 and 383.68 is: 573.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.88 : 656 = 383.68 : x
  2. Step 2: Convert to fraction form
    438.88/656 = 383.68/x
  3. Step 3: Cross multiply
    438.88x = 656 × 383.68
  4. Step 4: Simplify right side
    438.88x = 251,694.08
  5. Step 5: Solve for x
    x = 251,694.08/438.88
  6. Step 6: Final answer
    x = 573.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.