Home / 389,917.28-538,085.90-211,069.28

Finding the Fourth Proportional to 389,917.28, 538,085.90 and 211,069.28

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Solution

The fourth proportional to 389,917.28, 538,085.90 and 211,069.28 is: 291,275.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,917.28 : 538,085.90 = 211,069.28 : x
  2. Step 2: Convert to fraction form
    389,917.28/538,085.90 = 211,069.28/x
  3. Step 3: Cross multiply
    389,917.28x = 538,085.90 × 211,069.28
  4. Step 4: Simplify right side
    389,917.28x = 113,573,403,491.15
  5. Step 5: Solve for x
    x = 113,573,403,491.15/389,917.28
  6. Step 6: Final answer
    x = 291,275.64

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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.