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Finding the Fourth Proportional to 923.79, 1,273.23 and 674.70

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Solution

The fourth proportional to 923.79, 1,273.23 and 674.70 is: 929.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.79 : 1,273.23 = 674.70 : x
  2. Step 2: Convert to fraction form
    923.79/1,273.23 = 674.70/x
  3. Step 3: Cross multiply
    923.79x = 1,273.23 × 674.70
  4. Step 4: Simplify right side
    923.79x = 859,048.28
  5. Step 5: Solve for x
    x = 859,048.28/923.79
  6. Step 6: Final answer
    x = 929.92

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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.