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Finding the Fourth Proportional to 289,428.93, 399,192.27 and 253,556.67

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Solution

The fourth proportional to 289,428.93, 399,192.27 and 253,556.67 is: 349,715.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,428.93 : 399,192.27 = 253,556.67 : x
  2. Step 2: Convert to fraction form
    289,428.93/399,192.27 = 253,556.67/x
  3. Step 3: Cross multiply
    289,428.93x = 399,192.27 × 253,556.67
  4. Step 4: Simplify right side
    289,428.93x = 101,217,862,670.94
  5. Step 5: Solve for x
    x = 101,217,862,670.94/289,428.93
  6. Step 6: Final answer
    x = 349,715.78

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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.