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Finding the Fourth Proportional to 423.36, 633.12 and 418.08

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Solution

The fourth proportional to 423.36, 633.12 and 418.08 is: 625.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.36 : 633.12 = 418.08 : x
  2. Step 2: Convert to fraction form
    423.36/633.12 = 418.08/x
  3. Step 3: Cross multiply
    423.36x = 633.12 × 418.08
  4. Step 4: Simplify right side
    423.36x = 264,694.81
  5. Step 5: Solve for x
    x = 264,694.81/423.36
  6. Step 6: Final answer
    x = 625.22

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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.