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Finding the Fourth Proportional to 661,186.23, 991,700.51 and 391,475.67

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Solution

The fourth proportional to 661,186.23, 991,700.51 and 391,475.67 is: 587,166.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,186.23 : 991,700.51 = 391,475.67 : x
  2. Step 2: Convert to fraction form
    661,186.23/991,700.51 = 391,475.67/x
  3. Step 3: Cross multiply
    661,186.23x = 991,700.51 × 391,475.67
  4. Step 4: Simplify right side
    661,186.23x = 388,226,619,634.21
  5. Step 5: Solve for x
    x = 388,226,619,634.21/661,186.23
  6. Step 6: Final answer
    x = 587,166.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.