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Finding the Fourth Proportional to 1,988,223.03, 2,743,825.46 and 1,128,863.31

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Solution

The fourth proportional to 1,988,223.03, 2,743,825.46 and 1,128,863.31 is: 1,557,875.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,223.03 : 2,743,825.46 = 1,128,863.31 : x
  2. Step 2: Convert to fraction form
    1,988,223.03/2,743,825.46 = 1,128,863.31/x
  3. Step 3: Cross multiply
    1,988,223.03x = 2,743,825.46 × 1,128,863.31
  4. Step 4: Simplify right side
    1,988,223.03x = 3,097,403,885,193.56
  5. Step 5: Solve for x
    x = 3,097,403,885,193.56/1,988,223.03
  6. Step 6: Final answer
    x = 1,557,875.47

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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.