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Finding the Fourth Proportional to 230,384.85, 317,934.27 and 128,407.47

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Solution

The fourth proportional to 230,384.85, 317,934.27 and 128,407.47 is: 177,204.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,384.85 : 317,934.27 = 128,407.47 : x
  2. Step 2: Convert to fraction form
    230,384.85/317,934.27 = 128,407.47/x
  3. Step 3: Cross multiply
    230,384.85x = 317,934.27 × 128,407.47
  4. Step 4: Simplify right side
    230,384.85x = 40,825,135,237.00
  5. Step 5: Solve for x
    x = 40,825,135,237.00/230,384.85
  6. Step 6: Final answer
    x = 177,204.08

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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.