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Finding the Fourth Proportional to 303,666.40, 455,629.20 and 145,813.60

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Solution

The fourth proportional to 303,666.40, 455,629.20 and 145,813.60 is: 218,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,666.40 : 455,629.20 = 145,813.60 : x
  2. Step 2: Convert to fraction form
    303,666.40/455,629.20 = 145,813.60/x
  3. Step 3: Cross multiply
    303,666.40x = 455,629.20 × 145,813.60
  4. Step 4: Simplify right side
    303,666.40x = 66,436,933,917.12
  5. Step 5: Solve for x
    x = 66,436,933,917.12/303,666.40
  6. Step 6: Final answer
    x = 218,782.63

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1.5x scale

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.