Home / 780,039.90-1,170,059.85-380,936.70

Finding the Fourth Proportional to 780,039.90, 1,170,059.85 and 380,936.70

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Solution

The fourth proportional to 780,039.90, 1,170,059.85 and 380,936.70 is: 571,405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,039.90 : 1,170,059.85 = 380,936.70 : x
  2. Step 2: Convert to fraction form
    780,039.90/1,170,059.85 = 380,936.70/x
  3. Step 3: Cross multiply
    780,039.90x = 1,170,059.85 × 380,936.70
  4. Step 4: Simplify right side
    780,039.90x = 445,718,738,061.50
  5. Step 5: Solve for x
    x = 445,718,738,061.50/780,039.90
  6. Step 6: Final answer
    x = 571,405.05

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Similar ratio
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1.5x scale

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.