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Finding the Fourth Proportional to 1,992,968.40, 2,988,869.40 and 713,427.60

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Solution

The fourth proportional to 1,992,968.40, 2,988,869.40 and 713,427.60 is: 1,069,932.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,968.40 : 2,988,869.40 = 713,427.60 : x
  2. Step 2: Convert to fraction form
    1,992,968.40/2,988,869.40 = 713,427.60/x
  3. Step 3: Cross multiply
    1,992,968.40x = 2,988,869.40 × 713,427.60
  4. Step 4: Simplify right side
    1,992,968.40x = 2,132,341,922,755.44
  5. Step 5: Solve for x
    x = 2,132,341,922,755.44/1,992,968.40
  6. Step 6: Final answer
    x = 1,069,932.63

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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.