Home / 679,320.80-1,019,078.40-206,043.20

Finding the Fourth Proportional to 679,320.80, 1,019,078.40 and 206,043.20

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Solution

The fourth proportional to 679,320.80, 1,019,078.40 and 206,043.20 is: 309,094.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,320.80 : 1,019,078.40 = 206,043.20 : x
  2. Step 2: Convert to fraction form
    679,320.80/1,019,078.40 = 206,043.20/x
  3. Step 3: Cross multiply
    679,320.80x = 1,019,078.40 × 206,043.20
  4. Step 4: Simplify right side
    679,320.80x = 209,974,174,586.88
  5. Step 5: Solve for x
    x = 209,974,174,586.88/679,320.80
  6. Step 6: Final answer
    x = 309,094.28

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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.