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Finding the Fourth Proportional to 878,995.58, 1,325,081.60 and 820,405.40

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Solution

The fourth proportional to 878,995.58, 1,325,081.60 and 820,405.40 is: 1,236,757.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,995.58 : 1,325,081.60 = 820,405.40 : x
  2. Step 2: Convert to fraction form
    878,995.58/1,325,081.60 = 820,405.40/x
  3. Step 3: Cross multiply
    878,995.58x = 1,325,081.60 × 820,405.40
  4. Step 4: Simplify right side
    878,995.58x = 1,087,104,095,506.25
  5. Step 5: Solve for x
    x = 1,087,104,095,506.25/878,995.58
  6. Step 6: Final answer
    x = 1,236,757.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.