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Finding the Fourth Proportional to 438.36, 653.82 and 383.88

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Solution

The fourth proportional to 438.36, 653.82 and 383.88 is: 572.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.36 : 653.82 = 383.88 : x
  2. Step 2: Convert to fraction form
    438.36/653.82 = 383.88/x
  3. Step 3: Cross multiply
    438.36x = 653.82 × 383.88
  4. Step 4: Simplify right side
    438.36x = 250,988.42
  5. Step 5: Solve for x
    x = 250,988.42/438.36
  6. Step 6: Final answer
    x = 572.56

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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.