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Finding the Fourth Proportional to 644,715.78, 889,668.66 and 358,226.06

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Solution

The fourth proportional to 644,715.78, 889,668.66 and 358,226.06 is: 494,330.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,715.78 : 889,668.66 = 358,226.06 : x
  2. Step 2: Convert to fraction form
    644,715.78/889,668.66 = 358,226.06/x
  3. Step 3: Cross multiply
    644,715.78x = 889,668.66 × 358,226.06
  4. Step 4: Simplify right side
    644,715.78x = 318,702,498,777.28
  5. Step 5: Solve for x
    x = 318,702,498,777.28/644,715.78
  6. Step 6: Final answer
    x = 494,330.23

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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.