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Finding the Fourth Proportional to 1,328,724.40, 1,993,961.40 and 760,104.40

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Solution

The fourth proportional to 1,328,724.40, 1,993,961.40 and 760,104.40 is: 1,140,657.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,724.40 : 1,993,961.40 = 760,104.40 : x
  2. Step 2: Convert to fraction form
    1,328,724.40/1,993,961.40 = 760,104.40/x
  3. Step 3: Cross multiply
    1,328,724.40x = 1,993,961.40 × 760,104.40
  4. Step 4: Simplify right side
    1,328,724.40x = 1,515,618,833,570.16
  5. Step 5: Solve for x
    x = 1,515,618,833,570.16/1,328,724.40
  6. Step 6: Final answer
    x = 1,140,657.03

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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.