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Finding the Fourth Proportional to 640.36, 958.14 and 603.88

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Solution

The fourth proportional to 640.36, 958.14 and 603.88 is: 903.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.36 : 958.14 = 603.88 : x
  2. Step 2: Convert to fraction form
    640.36/958.14 = 603.88/x
  3. Step 3: Cross multiply
    640.36x = 958.14 × 603.88
  4. Step 4: Simplify right side
    640.36x = 578,601.58
  5. Step 5: Solve for x
    x = 578,601.58/640.36
  6. Step 6: Final answer
    x = 903.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.