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Finding the Fourth Proportional to 289,187.40, 399,021.89 and 181,695.15

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Solution

The fourth proportional to 289,187.40, 399,021.89 and 181,695.15 is: 250,703.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,187.40 : 399,021.89 = 181,695.15 : x
  2. Step 2: Convert to fraction form
    289,187.40/399,021.89 = 181,695.15/x
  3. Step 3: Cross multiply
    289,187.40x = 399,021.89 × 181,695.15
  4. Step 4: Simplify right side
    289,187.40x = 72,500,342,156.83
  5. Step 5: Solve for x
    x = 72,500,342,156.83/289,187.40
  6. Step 6: Final answer
    x = 250,703.67

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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.