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Finding the Fourth Proportional to 423.81, 636.48 and 346.92

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Solution

The fourth proportional to 423.81, 636.48 and 346.92 is: 521.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.81 : 636.48 = 346.92 : x
  2. Step 2: Convert to fraction form
    423.81/636.48 = 346.92/x
  3. Step 3: Cross multiply
    423.81x = 636.48 × 346.92
  4. Step 4: Simplify right side
    423.81x = 220,807.64
  5. Step 5: Solve for x
    x = 220,807.64/423.81
  6. Step 6: Final answer
    x = 521.01

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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.