Home / 1,390,986.84-2,083,058.82-678,718.20

Finding the Fourth Proportional to 1,390,986.84, 2,083,058.82 and 678,718.20

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Solution

The fourth proportional to 1,390,986.84, 2,083,058.82 and 678,718.20 is: 1,016,407.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,986.84 : 2,083,058.82 = 678,718.20 : x
  2. Step 2: Convert to fraction form
    1,390,986.84/2,083,058.82 = 678,718.20/x
  3. Step 3: Cross multiply
    1,390,986.84x = 2,083,058.82 × 678,718.20
  4. Step 4: Simplify right side
    1,390,986.84x = 1,413,809,932,804.52
  5. Step 5: Solve for x
    x = 1,413,809,932,804.52/1,390,986.84
  6. Step 6: Final answer
    x = 1,016,407.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.