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Finding the Fourth Proportional to 934.78, 1,289.82 and 541.93

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Solution

The fourth proportional to 934.78, 1,289.82 and 541.93 is: 747.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.78 : 1,289.82 = 541.93 : x
  2. Step 2: Convert to fraction form
    934.78/1,289.82 = 541.93/x
  3. Step 3: Cross multiply
    934.78x = 1,289.82 × 541.93
  4. Step 4: Simplify right side
    934.78x = 698,992.15
  5. Step 5: Solve for x
    x = 698,992.15/934.78
  6. Step 6: Final answer
    x = 747.76

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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.