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Finding the Fourth Proportional to 741.63, 1,021.32 and 635.88

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Solution

The fourth proportional to 741.63, 1,021.32 and 635.88 is: 875.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.63 : 1,021.32 = 635.88 : x
  2. Step 2: Convert to fraction form
    741.63/1,021.32 = 635.88/x
  3. Step 3: Cross multiply
    741.63x = 1,021.32 × 635.88
  4. Step 4: Simplify right side
    741.63x = 649,436.96
  5. Step 5: Solve for x
    x = 649,436.96/741.63
  6. Step 6: Final answer
    x = 875.69

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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.