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Finding the Fourth Proportional to 654.62, 903.52 and 389.08

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Solution

The fourth proportional to 654.62, 903.52 and 389.08 is: 537.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.62 : 903.52 = 389.08 : x
  2. Step 2: Convert to fraction form
    654.62/903.52 = 389.08/x
  3. Step 3: Cross multiply
    654.62x = 903.52 × 389.08
  4. Step 4: Simplify right side
    654.62x = 351,541.56
  5. Step 5: Solve for x
    x = 351,541.56/654.62
  6. Step 6: Final answer
    x = 537.02

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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.