Home / 783,139.20-1,174,708.80-409,113.60

Finding the Fourth Proportional to 783,139.20, 1,174,708.80 and 409,113.60

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Solution

The fourth proportional to 783,139.20, 1,174,708.80 and 409,113.60 is: 613,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,139.20 : 1,174,708.80 = 409,113.60 : x
  2. Step 2: Convert to fraction form
    783,139.20/1,174,708.80 = 409,113.60/x
  3. Step 3: Cross multiply
    783,139.20x = 1,174,708.80 × 409,113.60
  4. Step 4: Simplify right side
    783,139.20x = 480,589,346,119.68
  5. Step 5: Solve for x
    x = 480,589,346,119.68/783,139.20
  6. Step 6: Final answer
    x = 613,670.40

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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.