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Finding the Fourth Proportional to 3,107.66, 4,661.54 and 767.66

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Solution

The fourth proportional to 3,107.66, 4,661.54 and 767.66 is: 1,151.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.66 : 4,661.54 = 767.66 : x
  2. Step 2: Convert to fraction form
    3,107.66/4,661.54 = 767.66/x
  3. Step 3: Cross multiply
    3,107.66x = 4,661.54 × 767.66
  4. Step 4: Simplify right side
    3,107.66x = 3,578,477.80
  5. Step 5: Solve for x
    x = 3,578,477.80/3,107.66
  6. Step 6: Final answer
    x = 1,151.50

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1.5x scale

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.