Home / 1,222,837.40-1,687,518.90-678,974.24

Finding the Fourth Proportional to 1,222,837.40, 1,687,518.90 and 678,974.24

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Solution

The fourth proportional to 1,222,837.40, 1,687,518.90 and 678,974.24 is: 936,986.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,837.40 : 1,687,518.90 = 678,974.24 : x
  2. Step 2: Convert to fraction form
    1,222,837.40/1,687,518.90 = 678,974.24/x
  3. Step 3: Cross multiply
    1,222,837.40x = 1,687,518.90 × 678,974.24
  4. Step 4: Simplify right side
    1,222,837.40x = 1,145,781,862,613.14
  5. Step 5: Solve for x
    x = 1,145,781,862,613.14/1,222,837.40
  6. Step 6: Final answer
    x = 936,986.28

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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.