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Finding the Fourth Proportional to 311,407.68, 429,774.36 and 190,628.76

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Solution

The fourth proportional to 311,407.68, 429,774.36 and 190,628.76 is: 263,087.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,407.68 : 429,774.36 = 190,628.76 : x
  2. Step 2: Convert to fraction form
    311,407.68/429,774.36 = 190,628.76/x
  3. Step 3: Cross multiply
    311,407.68x = 429,774.36 × 190,628.76
  4. Step 4: Simplify right side
    311,407.68x = 81,927,353,326.59
  5. Step 5: Solve for x
    x = 81,927,353,326.59/311,407.68
  6. Step 6: Final answer
    x = 263,087.13

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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.