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Finding the Fourth Proportional to 923.28, 1,384.38 and 346.20

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Solution

The fourth proportional to 923.28, 1,384.38 and 346.20 is: 519.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.28 : 1,384.38 = 346.20 : x
  2. Step 2: Convert to fraction form
    923.28/1,384.38 = 346.20/x
  3. Step 3: Cross multiply
    923.28x = 1,384.38 × 346.20
  4. Step 4: Simplify right side
    923.28x = 479,272.36
  5. Step 5: Solve for x
    x = 479,272.36/923.28
  6. Step 6: Final answer
    x = 519.10

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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.