Home / 1,222,357.20-1,686,826.80-678,461.28

Finding the Fourth Proportional to 1,222,357.20, 1,686,826.80 and 678,461.28

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Solution

The fourth proportional to 1,222,357.20, 1,686,826.80 and 678,461.28 is: 936,262.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,357.20 : 1,686,826.80 = 678,461.28 : x
  2. Step 2: Convert to fraction form
    1,222,357.20/1,686,826.80 = 678,461.28/x
  3. Step 3: Cross multiply
    1,222,357.20x = 1,686,826.80 × 678,461.28
  4. Step 4: Simplify right side
    1,222,357.20x = 1,144,446,669,866.30
  5. Step 5: Solve for x
    x = 1,144,446,669,866.30/1,222,357.20
  6. Step 6: Final answer
    x = 936,262.06

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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.