Home / 1,222,391.42-1,686,815.75-678,484.41

Finding the Fourth Proportional to 1,222,391.42, 1,686,815.75 and 678,484.41

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Solution

The fourth proportional to 1,222,391.42, 1,686,815.75 and 678,484.41 is: 936,261.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,391.42 : 1,686,815.75 = 678,484.41 : x
  2. Step 2: Convert to fraction form
    1,222,391.42/1,686,815.75 = 678,484.41/x
  3. Step 3: Cross multiply
    1,222,391.42x = 1,686,815.75 × 678,484.41
  4. Step 4: Simplify right side
    1,222,391.42x = 1,144,478,185,525.04
  5. Step 5: Solve for x
    x = 1,144,478,185,525.04/1,222,391.42
  6. Step 6: Final answer
    x = 936,261.64

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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.