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Finding the Fourth Proportional to 654.40, 903.10 and 359.70

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Solution

The fourth proportional to 654.40, 903.10 and 359.70 is: 496.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.40 : 903.10 = 359.70 : x
  2. Step 2: Convert to fraction form
    654.40/903.10 = 359.70/x
  3. Step 3: Cross multiply
    654.40x = 903.10 × 359.70
  4. Step 4: Simplify right side
    654.40x = 324,845.07
  5. Step 5: Solve for x
    x = 324,845.07/654.40
  6. Step 6: Final answer
    x = 496.40

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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.