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Finding the Fourth Proportional to 665,128.71, 997,685.73 and 191,798.73

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Solution

The fourth proportional to 665,128.71, 997,685.73 and 191,798.73 is: 287,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,128.71 : 997,685.73 = 191,798.73 : x
  2. Step 2: Convert to fraction form
    665,128.71/997,685.73 = 191,798.73/x
  3. Step 3: Cross multiply
    665,128.71x = 997,685.73 × 191,798.73
  4. Step 4: Simplify right side
    665,128.71x = 191,354,855,953.12
  5. Step 5: Solve for x
    x = 191,354,855,953.12/665,128.71
  6. Step 6: Final answer
    x = 287,695.98

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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.