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Finding the Fourth Proportional to 982.68, 1,476.81 and 946.32

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Solution

The fourth proportional to 982.68, 1,476.81 and 946.32 is: 1,422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.68 : 1,476.81 = 946.32 : x
  2. Step 2: Convert to fraction form
    982.68/1,476.81 = 946.32/x
  3. Step 3: Cross multiply
    982.68x = 1,476.81 × 946.32
  4. Step 4: Simplify right side
    982.68x = 1,397,534.84
  5. Step 5: Solve for x
    x = 1,397,534.84/982.68
  6. Step 6: Final answer
    x = 1,422.17

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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.