Home / 280,073,279.70-420,109,919.55-198,284,509.80

Finding the Fourth Proportional to 280,073,279.70, 420,109,919.55 and 198,284,509.80

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Solution

The fourth proportional to 280,073,279.70, 420,109,919.55 and 198,284,509.80 is: 297,426,764.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,073,279.70 : 420,109,919.55 = 198,284,509.80 : x
  2. Step 2: Convert to fraction form
    280,073,279.70/420,109,919.55 = 198,284,509.80/x
  3. Step 3: Cross multiply
    280,073,279.70x = 420,109,919.55 × 198,284,509.80
  4. Step 4: Simplify right side
    280,073,279.70x = 83,301,289,460,089,200
  5. Step 5: Solve for x
    x = 83,301,289,460,089,200/280,073,279.70
  6. Step 6: Final answer
    x = 297,426,764.70

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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.