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Finding the Fourth Proportional to 923.05, 1,384.61 and 306.81

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Solution

The fourth proportional to 923.05, 1,384.61 and 306.81 is: 460.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.05 : 1,384.61 = 306.81 : x
  2. Step 2: Convert to fraction form
    923.05/1,384.61 = 306.81/x
  3. Step 3: Cross multiply
    923.05x = 1,384.61 × 306.81
  4. Step 4: Simplify right side
    923.05x = 424,812.19
  5. Step 5: Solve for x
    x = 424,812.19/923.05
  6. Step 6: Final answer
    x = 460.23

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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.