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Finding the Fourth Proportional to 923.94, 1,385.82 and 274.68

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Solution

The fourth proportional to 923.94, 1,385.82 and 274.68 is: 411.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.94 : 1,385.82 = 274.68 : x
  2. Step 2: Convert to fraction form
    923.94/1,385.82 = 274.68/x
  3. Step 3: Cross multiply
    923.94x = 1,385.82 × 274.68
  4. Step 4: Simplify right side
    923.94x = 380,657.04
  5. Step 5: Solve for x
    x = 380,657.04/923.94
  6. Step 6: Final answer
    x = 411.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.