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Finding the Fourth Proportional to 659,678.96, 989,559.48 and 186,400.64

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Solution

The fourth proportional to 659,678.96, 989,559.48 and 186,400.64 is: 279,612.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,678.96 : 989,559.48 = 186,400.64 : x
  2. Step 2: Convert to fraction form
    659,678.96/989,559.48 = 186,400.64/x
  3. Step 3: Cross multiply
    659,678.96x = 989,559.48 × 186,400.64
  4. Step 4: Simplify right side
    659,678.96x = 184,454,520,390.07
  5. Step 5: Solve for x
    x = 184,454,520,390.07/659,678.96
  6. Step 6: Final answer
    x = 279,612.56

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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.