Home / 780,039.40-1,170,059.10-380,936.20

Finding the Fourth Proportional to 780,039.40, 1,170,059.10 and 380,936.20

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Solution

The fourth proportional to 780,039.40, 1,170,059.10 and 380,936.20 is: 571,404.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,039.40 : 1,170,059.10 = 380,936.20 : x
  2. Step 2: Convert to fraction form
    780,039.40/1,170,059.10 = 380,936.20/x
  3. Step 3: Cross multiply
    780,039.40x = 1,170,059.10 × 380,936.20
  4. Step 4: Simplify right side
    780,039.40x = 445,717,867,329.42
  5. Step 5: Solve for x
    x = 445,717,867,329.42/780,039.40
  6. Step 6: Final answer
    x = 571,404.30

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Double scale
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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.