Home / 989,974.60-1,483,618.69-420,641.80

Finding the Fourth Proportional to 989,974.60, 1,483,618.69 and 420,641.80

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Solution

The fourth proportional to 989,974.60, 1,483,618.69 and 420,641.80 is: 630,391.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,974.60 : 1,483,618.69 = 420,641.80 : x
  2. Step 2: Convert to fraction form
    989,974.60/1,483,618.69 = 420,641.80/x
  3. Step 3: Cross multiply
    989,974.60x = 1,483,618.69 × 420,641.80
  4. Step 4: Simplify right side
    989,974.60x = 624,072,036,275.24
  5. Step 5: Solve for x
    x = 624,072,036,275.24/989,974.60
  6. Step 6: Final answer
    x = 630,391.97

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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.