Home / 219,288.06-302,620.00-128,645.57

Finding the Fourth Proportional to 219,288.06, 302,620.00 and 128,645.57

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Solution

The fourth proportional to 219,288.06, 302,620.00 and 128,645.57 is: 177,532.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,288.06 : 302,620.00 = 128,645.57 : x
  2. Step 2: Convert to fraction form
    219,288.06/302,620.00 = 128,645.57/x
  3. Step 3: Cross multiply
    219,288.06x = 302,620.00 × 128,645.57
  4. Step 4: Simplify right side
    219,288.06x = 38,930,721,367.31
  5. Step 5: Solve for x
    x = 38,930,721,367.31/219,288.06
  6. Step 6: Final answer
    x = 177,532.34

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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.