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Finding the Fourth Proportional to 643.02, 958.88 and 637.17

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Solution

The fourth proportional to 643.02, 958.88 and 637.17 is: 950.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.02 : 958.88 = 637.17 : x
  2. Step 2: Convert to fraction form
    643.02/958.88 = 637.17/x
  3. Step 3: Cross multiply
    643.02x = 958.88 × 637.17
  4. Step 4: Simplify right side
    643.02x = 610,973.56
  5. Step 5: Solve for x
    x = 610,973.56/643.02
  6. Step 6: Final answer
    x = 950.16

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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.