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Finding the Fourth Proportional to 499,603.71, 689,451.90 and 281,811.65

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Solution

The fourth proportional to 499,603.71, 689,451.90 and 281,811.65 is: 388,899.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,603.71 : 689,451.90 = 281,811.65 : x
  2. Step 2: Convert to fraction form
    499,603.71/689,451.90 = 281,811.65/x
  3. Step 3: Cross multiply
    499,603.71x = 689,451.90 × 281,811.65
  4. Step 4: Simplify right side
    499,603.71x = 194,295,574,087.38
  5. Step 5: Solve for x
    x = 194,295,574,087.38/499,603.71
  6. Step 6: Final answer
    x = 388,899.38

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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.