Home / 659,982.40-989,078.13-280,427.20

Finding the Fourth Proportional to 659,982.40, 989,078.13 and 280,427.20

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Solution

The fourth proportional to 659,982.40, 989,078.13 and 280,427.20 is: 420,260.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,982.40 : 989,078.13 = 280,427.20 : x
  2. Step 2: Convert to fraction form
    659,982.40/989,078.13 = 280,427.20/x
  3. Step 3: Cross multiply
    659,982.40x = 989,078.13 × 280,427.20
  4. Step 4: Simplify right side
    659,982.40x = 277,364,410,577.14
  5. Step 5: Solve for x
    x = 277,364,410,577.14/659,982.40
  6. Step 6: Final answer
    x = 420,260.31

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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.