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Finding the Fourth Proportional to 643.03, 959.49 and 603.84

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Solution

The fourth proportional to 643.03, 959.49 and 603.84 is: 901.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.03 : 959.49 = 603.84 : x
  2. Step 2: Convert to fraction form
    643.03/959.49 = 603.84/x
  3. Step 3: Cross multiply
    643.03x = 959.49 × 603.84
  4. Step 4: Simplify right side
    643.03x = 579,375.42
  5. Step 5: Solve for x
    x = 579,375.42/643.03
  6. Step 6: Final answer
    x = 901.02

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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.