Home / 990,134.40-1,485,055.80-280,234.20

Finding the Fourth Proportional to 990,134.40, 1,485,055.80 and 280,234.20

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Solution

The fourth proportional to 990,134.40, 1,485,055.80 and 280,234.20 is: 420,310.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,134.40 : 1,485,055.80 = 280,234.20 : x
  2. Step 2: Convert to fraction form
    990,134.40/1,485,055.80 = 280,234.20/x
  3. Step 3: Cross multiply
    990,134.40x = 1,485,055.80 × 280,234.20
  4. Step 4: Simplify right side
    990,134.40x = 416,163,424,068.36
  5. Step 5: Solve for x
    x = 416,163,424,068.36/990,134.40
  6. Step 6: Final answer
    x = 420,310.03

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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.