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Finding the Fourth Proportional to 654.58, 903.25 and 378.58

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Solution

The fourth proportional to 654.58, 903.25 and 378.58 is: 522.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.58 : 903.25 = 378.58 : x
  2. Step 2: Convert to fraction form
    654.58/903.25 = 378.58/x
  3. Step 3: Cross multiply
    654.58x = 903.25 × 378.58
  4. Step 4: Simplify right side
    654.58x = 341,952.39
  5. Step 5: Solve for x
    x = 341,952.39/654.58
  6. Step 6: Final answer
    x = 522.40

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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.