Home / 1,051,021.72-1,449,949.26-643,143.16

Finding the Fourth Proportional to 1,051,021.72, 1,449,949.26 and 643,143.16

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Solution

The fourth proportional to 1,051,021.72, 1,449,949.26 and 643,143.16 is: 887,255.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051,021.72 : 1,449,949.26 = 643,143.16 : x
  2. Step 2: Convert to fraction form
    1,051,021.72/1,449,949.26 = 643,143.16/x
  3. Step 3: Cross multiply
    1,051,021.72x = 1,449,949.26 × 643,143.16
  4. Step 4: Simplify right side
    1,051,021.72x = 932,524,948,916.06
  5. Step 5: Solve for x
    x = 932,524,948,916.06/1,051,021.72
  6. Step 6: Final answer
    x = 887,255.64

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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.