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Finding the Fourth Proportional to 2,661.66, 4,007.93 and 1,973.21

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Solution

The fourth proportional to 2,661.66, 4,007.93 and 1,973.21 is: 2,971.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.66 : 4,007.93 = 1,973.21 : x
  2. Step 2: Convert to fraction form
    2,661.66/4,007.93 = 1,973.21/x
  3. Step 3: Cross multiply
    2,661.66x = 4,007.93 × 1,973.21
  4. Step 4: Simplify right side
    2,661.66x = 7,908,491.29
  5. Step 5: Solve for x
    x = 7,908,491.29/2,661.66
  6. Step 6: Final answer
    x = 2,971.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.