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Finding the Fourth Proportional to 923.65, 1,383.37 and 557.66

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Solution

The fourth proportional to 923.65, 1,383.37 and 557.66 is: 835.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.65 : 1,383.37 = 557.66 : x
  2. Step 2: Convert to fraction form
    923.65/1,383.37 = 557.66/x
  3. Step 3: Cross multiply
    923.65x = 1,383.37 × 557.66
  4. Step 4: Simplify right side
    923.65x = 771,450.11
  5. Step 5: Solve for x
    x = 771,450.11/923.65
  6. Step 6: Final answer
    x = 835.22

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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.