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Finding the Fourth Proportional to 1,371.09, 1,892.42 and 946.32

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Solution

The fourth proportional to 1,371.09, 1,892.42 and 946.32 is: 1,306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.09 : 1,892.42 = 946.32 : x
  2. Step 2: Convert to fraction form
    1,371.09/1,892.42 = 946.32/x
  3. Step 3: Cross multiply
    1,371.09x = 1,892.42 × 946.32
  4. Step 4: Simplify right side
    1,371.09x = 1,790,823.07
  5. Step 5: Solve for x
    x = 1,790,823.07/1,371.09
  6. Step 6: Final answer
    x = 1,306.13

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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.