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Finding the Fourth Proportional to 659,231.60, 989,009.40 and 185,910.80

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Solution

The fourth proportional to 659,231.60, 989,009.40 and 185,910.80 is: 278,911.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,231.60 : 989,009.40 = 185,910.80 : x
  2. Step 2: Convert to fraction form
    659,231.60/989,009.40 = 185,910.80/x
  3. Step 3: Cross multiply
    659,231.60x = 989,009.40 × 185,910.80
  4. Step 4: Simplify right side
    659,231.60x = 183,867,528,761.52
  5. Step 5: Solve for x
    x = 183,867,528,761.52/659,231.60
  6. Step 6: Final answer
    x = 278,911.89

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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.