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Finding the Fourth Proportional to 303,357.60, 455,036.40 and 208,879.20

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Solution

The fourth proportional to 303,357.60, 455,036.40 and 208,879.20 is: 313,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,357.60 : 455,036.40 = 208,879.20 : x
  2. Step 2: Convert to fraction form
    303,357.60/455,036.40 = 208,879.20/x
  3. Step 3: Cross multiply
    303,357.60x = 455,036.40 × 208,879.20
  4. Step 4: Simplify right side
    303,357.60x = 95,047,639,202.88
  5. Step 5: Solve for x
    x = 95,047,639,202.88/303,357.60
  6. Step 6: Final answer
    x = 313,318.80

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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.