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Finding the Fourth Proportional to 923.81, 1,385.66 and 375.99

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Solution

The fourth proportional to 923.81, 1,385.66 and 375.99 is: 563.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.81 : 1,385.66 = 375.99 : x
  2. Step 2: Convert to fraction form
    923.81/1,385.66 = 375.99/x
  3. Step 3: Cross multiply
    923.81x = 1,385.66 × 375.99
  4. Step 4: Simplify right side
    923.81x = 520,995.73
  5. Step 5: Solve for x
    x = 520,995.73/923.81
  6. Step 6: Final answer
    x = 563.97

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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.