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Finding the Fourth Proportional to 937.54, 1,293.14 and 642.82

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Solution

The fourth proportional to 937.54, 1,293.14 and 642.82 is: 886.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.54 : 1,293.14 = 642.82 : x
  2. Step 2: Convert to fraction form
    937.54/1,293.14 = 642.82/x
  3. Step 3: Cross multiply
    937.54x = 1,293.14 × 642.82
  4. Step 4: Simplify right side
    937.54x = 831,256.25
  5. Step 5: Solve for x
    x = 831,256.25/937.54
  6. Step 6: Final answer
    x = 886.64

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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.