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Finding the Fourth Proportional to 986,979.60, 1,384,570.80 and 986,979.60

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Solution

The fourth proportional to 986,979.60, 1,384,570.80 and 986,979.60 is: 1,384,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,979.60 : 1,384,570.80 = 986,979.60 : x
  2. Step 2: Convert to fraction form
    986,979.60/1,384,570.80 = 986,979.60/x
  3. Step 3: Cross multiply
    986,979.60x = 1,384,570.80 × 986,979.60
  4. Step 4: Simplify right side
    986,979.60x = 1,366,543,134,355.68
  5. Step 5: Solve for x
    x = 1,366,543,134,355.68/986,979.60
  6. Step 6: Final answer
    x = 1,384,570.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.