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Finding the Fourth Proportional to 654.71, 979.92 and 423.01

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Solution

The fourth proportional to 654.71, 979.92 and 423.01 is: 633.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.71 : 979.92 = 423.01 : x
  2. Step 2: Convert to fraction form
    654.71/979.92 = 423.01/x
  3. Step 3: Cross multiply
    654.71x = 979.92 × 423.01
  4. Step 4: Simplify right side
    654.71x = 414,515.96
  5. Step 5: Solve for x
    x = 414,515.96/654.71
  6. Step 6: Final answer
    x = 633.13

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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.