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Finding the Fourth Proportional to 1,795,712.12, 2,478,135.40 and 979,968.48

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Solution

The fourth proportional to 1,795,712.12, 2,478,135.40 and 979,968.48 is: 1,352,385.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,795,712.12 : 2,478,135.40 = 979,968.48 : x
  2. Step 2: Convert to fraction form
    1,795,712.12/2,478,135.40 = 979,968.48/x
  3. Step 3: Cross multiply
    1,795,712.12x = 2,478,135.40 × 979,968.48
  4. Step 4: Simplify right side
    1,795,712.12x = 2,428,494,578,722.27
  5. Step 5: Solve for x
    x = 2,428,494,578,722.27/1,795,712.12
  6. Step 6: Final answer
    x = 1,352,385.24

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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.