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Finding the Fourth Proportional to 1,541.70, 2,128.25 and 982.94

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Solution

The fourth proportional to 1,541.70, 2,128.25 and 982.94 is: 1,356.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.70 : 2,128.25 = 982.94 : x
  2. Step 2: Convert to fraction form
    1,541.70/2,128.25 = 982.94/x
  3. Step 3: Cross multiply
    1,541.70x = 2,128.25 × 982.94
  4. Step 4: Simplify right side
    1,541.70x = 2,091,942.06
  5. Step 5: Solve for x
    x = 2,091,942.06/1,541.70
  6. Step 6: Final answer
    x = 1,356.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.