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Finding the Fourth Proportional to 878,718.80, 1,317,041.40 and 656,843.60

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Solution

The fourth proportional to 878,718.80, 1,317,041.40 and 656,843.60 is: 984,490.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,718.80 : 1,317,041.40 = 656,843.60 : x
  2. Step 2: Convert to fraction form
    878,718.80/1,317,041.40 = 656,843.60/x
  3. Step 3: Cross multiply
    878,718.80x = 1,317,041.40 × 656,843.60
  4. Step 4: Simplify right side
    878,718.80x = 865,090,214,525.04
  5. Step 5: Solve for x
    x = 865,090,214,525.04/878,718.80
  6. Step 6: Final answer
    x = 984,490.39

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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.