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Finding the Fourth Proportional to 642.63, 958.89 and 603.44

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Solution

The fourth proportional to 642.63, 958.89 and 603.44 is: 900.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.63 : 958.89 = 603.44 : x
  2. Step 2: Convert to fraction form
    642.63/958.89 = 603.44/x
  3. Step 3: Cross multiply
    642.63x = 958.89 × 603.44
  4. Step 4: Simplify right side
    642.63x = 578,634.98
  5. Step 5: Solve for x
    x = 578,634.98/642.63
  6. Step 6: Final answer
    x = 900.42

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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.