Home / 1,209,863.40-1,816,107.30-678,422.40

Finding the Fourth Proportional to 1,209,863.40, 1,816,107.30 and 678,422.40

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Solution

The fourth proportional to 1,209,863.40, 1,816,107.30 and 678,422.40 is: 1,018,369.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,863.40 : 1,816,107.30 = 678,422.40 : x
  2. Step 2: Convert to fraction form
    1,209,863.40/1,816,107.30 = 678,422.40/x
  3. Step 3: Cross multiply
    1,209,863.40x = 1,816,107.30 × 678,422.40
  4. Step 4: Simplify right side
    1,209,863.40x = 1,232,087,873,123.52
  5. Step 5: Solve for x
    x = 1,232,087,873,123.52/1,209,863.40
  6. Step 6: Final answer
    x = 1,018,369.41

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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.