Home / 989,078.24-1,483,497.05-420,687.88

Finding the Fourth Proportional to 989,078.24, 1,483,497.05 and 420,687.88

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Solution

The fourth proportional to 989,078.24, 1,483,497.05 and 420,687.88 is: 630,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,078.24 : 1,483,497.05 = 420,687.88 : x
  2. Step 2: Convert to fraction form
    989,078.24/1,483,497.05 = 420,687.88/x
  3. Step 3: Cross multiply
    989,078.24x = 1,483,497.05 × 420,687.88
  4. Step 4: Simplify right side
    989,078.24x = 624,089,223,138.57
  5. Step 5: Solve for x
    x = 624,089,223,138.57/989,078.24
  6. Step 6: Final answer
    x = 630,980.64

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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.