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Finding the Fourth Proportional to 958.84, 1,323.63 and 644

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Solution

The fourth proportional to 958.84, 1,323.63 and 644 is: 889.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.84 : 1,323.63 = 644 : x
  2. Step 2: Convert to fraction form
    958.84/1,323.63 = 644/x
  3. Step 3: Cross multiply
    958.84x = 1,323.63 × 644
  4. Step 4: Simplify right side
    958.84x = 852,417.72
  5. Step 5: Solve for x
    x = 852,417.72/958.84
  6. Step 6: Final answer
    x = 889.01

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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.