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Finding the Fourth Proportional to 654.45, 979.25 and 647.16

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Solution

The fourth proportional to 654.45, 979.25 and 647.16 is: 968.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.45 : 979.25 = 647.16 : x
  2. Step 2: Convert to fraction form
    654.45/979.25 = 647.16/x
  3. Step 3: Cross multiply
    654.45x = 979.25 × 647.16
  4. Step 4: Simplify right side
    654.45x = 633,728.19
  5. Step 5: Solve for x
    x = 633,728.19/654.45
  6. Step 6: Final answer
    x = 968.34

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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.