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Finding the Fourth Proportional to 649.55, 969.70 and 626.77

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Solution

The fourth proportional to 649.55, 969.70 and 626.77 is: 935.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.55 : 969.70 = 626.77 : x
  2. Step 2: Convert to fraction form
    649.55/969.70 = 626.77/x
  3. Step 3: Cross multiply
    649.55x = 969.70 × 626.77
  4. Step 4: Simplify right side
    649.55x = 607,778.87
  5. Step 5: Solve for x
    x = 607,778.87/649.55
  6. Step 6: Final answer
    x = 935.69

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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.