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Finding the Fourth Proportional to 654.44, 979.71 and 432.33

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Solution

The fourth proportional to 654.44, 979.71 and 432.33 is: 647.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.44 : 979.71 = 432.33 : x
  2. Step 2: Convert to fraction form
    654.44/979.71 = 432.33/x
  3. Step 3: Cross multiply
    654.44x = 979.71 × 432.33
  4. Step 4: Simplify right side
    654.44x = 423,558.02
  5. Step 5: Solve for x
    x = 423,558.02/654.44
  6. Step 6: Final answer
    x = 647.21

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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.