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Finding the Fourth Proportional to 639,603.05, 882,653.51 and 353,123.69

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Solution

The fourth proportional to 639,603.05, 882,653.51 and 353,123.69 is: 487,311.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,603.05 : 882,653.51 = 353,123.69 : x
  2. Step 2: Convert to fraction form
    639,603.05/882,653.51 = 353,123.69/x
  3. Step 3: Cross multiply
    639,603.05x = 882,653.51 × 353,123.69
  4. Step 4: Simplify right side
    639,603.05x = 311,685,860,912.19
  5. Step 5: Solve for x
    x = 311,685,860,912.19/639,603.05
  6. Step 6: Final answer
    x = 487,311.41

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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.