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Finding the Fourth Proportional to 659,435.60, 989,315.40 and 186,114.80

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Solution

The fourth proportional to 659,435.60, 989,315.40 and 186,114.80 is: 279,217.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,435.60 : 989,315.40 = 186,114.80 : x
  2. Step 2: Convert to fraction form
    659,435.60/989,315.40 = 186,114.80/x
  3. Step 3: Cross multiply
    659,435.60x = 989,315.40 × 186,114.80
  4. Step 4: Simplify right side
    659,435.60x = 184,126,237,807.92
  5. Step 5: Solve for x
    x = 184,126,237,807.92/659,435.60
  6. Step 6: Final answer
    x = 279,217.92

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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.