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Finding the Fourth Proportional to 651.29, 969.49 and 641.57

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Solution

The fourth proportional to 651.29, 969.49 and 641.57 is: 955.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.29 : 969.49 = 641.57 : x
  2. Step 2: Convert to fraction form
    651.29/969.49 = 641.57/x
  3. Step 3: Cross multiply
    651.29x = 969.49 × 641.57
  4. Step 4: Simplify right side
    651.29x = 621,991.65
  5. Step 5: Solve for x
    x = 621,991.65/651.29
  6. Step 6: Final answer
    x = 955.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.