Home / 678,138.40-1,017,790.80-299,641.60

Finding the Fourth Proportional to 678,138.40, 1,017,790.80 and 299,641.60

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Solution

The fourth proportional to 678,138.40, 1,017,790.80 and 299,641.60 is: 449,720.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,138.40 : 1,017,790.80 = 299,641.60 : x
  2. Step 2: Convert to fraction form
    678,138.40/1,017,790.80 = 299,641.60/x
  3. Step 3: Cross multiply
    678,138.40x = 1,017,790.80 × 299,641.60
  4. Step 4: Simplify right side
    678,138.40x = 304,972,463,777.28
  5. Step 5: Solve for x
    x = 304,972,463,777.28/678,138.40
  6. Step 6: Final answer
    x = 449,720.09

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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.