Home / 856,178.40-1,182,320.40-640,944.80

Finding the Fourth Proportional to 856,178.40, 1,182,320.40 and 640,944.80

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Solution

The fourth proportional to 856,178.40, 1,182,320.40 and 640,944.80 is: 885,098.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,178.40 : 1,182,320.40 = 640,944.80 : x
  2. Step 2: Convert to fraction form
    856,178.40/1,182,320.40 = 640,944.80/x
  3. Step 3: Cross multiply
    856,178.40x = 1,182,320.40 × 640,944.80
  4. Step 4: Simplify right side
    856,178.40x = 757,802,112,313.92
  5. Step 5: Solve for x
    x = 757,802,112,313.92/856,178.40
  6. Step 6: Final answer
    x = 885,098.38

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.