Home / 1,222,398.72-1,686,825.78-678,491.76

Finding the Fourth Proportional to 1,222,398.72, 1,686,825.78 and 678,491.76

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Solution

The fourth proportional to 1,222,398.72, 1,686,825.78 and 678,491.76 is: 936,271.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,398.72 : 1,686,825.78 = 678,491.76 : x
  2. Step 2: Convert to fraction form
    1,222,398.72/1,686,825.78 = 678,491.76/x
  3. Step 3: Cross multiply
    1,222,398.72x = 1,686,825.78 × 678,491.76
  4. Step 4: Simplify right side
    1,222,398.72x = 1,144,497,392,285.57
  5. Step 5: Solve for x
    x = 1,144,497,392,285.57/1,222,398.72
  6. Step 6: Final answer
    x = 936,271.75

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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.