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Finding the Fourth Proportional to 423.87, 583.92 and 330.45

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Solution

The fourth proportional to 423.87, 583.92 and 330.45 is: 455.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.87 : 583.92 = 330.45 : x
  2. Step 2: Convert to fraction form
    423.87/583.92 = 330.45/x
  3. Step 3: Cross multiply
    423.87x = 583.92 × 330.45
  4. Step 4: Simplify right side
    423.87x = 192,956.36
  5. Step 5: Solve for x
    x = 192,956.36/423.87
  6. Step 6: Final answer
    x = 455.23

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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.