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Finding the Fourth Proportional to 923.83, 1,273.56 and 661.39

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Solution

The fourth proportional to 923.83, 1,273.56 and 661.39 is: 911.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.83 : 1,273.56 = 661.39 : x
  2. Step 2: Convert to fraction form
    923.83/1,273.56 = 661.39/x
  3. Step 3: Cross multiply
    923.83x = 1,273.56 × 661.39
  4. Step 4: Simplify right side
    923.83x = 842,319.85
  5. Step 5: Solve for x
    x = 842,319.85/923.83
  6. Step 6: Final answer
    x = 911.77

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1.5x scale

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.