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Finding the Fourth Proportional to 303,487.60, 455,231.40 and 209,009.20

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Solution

The fourth proportional to 303,487.60, 455,231.40 and 209,009.20 is: 313,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,487.60 : 455,231.40 = 209,009.20 : x
  2. Step 2: Convert to fraction form
    303,487.60/455,231.40 = 209,009.20/x
  3. Step 3: Cross multiply
    303,487.60x = 455,231.40 × 209,009.20
  4. Step 4: Simplify right side
    303,487.60x = 95,147,550,728.88
  5. Step 5: Solve for x
    x = 95,147,550,728.88/303,487.60
  6. Step 6: Final answer
    x = 313,513.80

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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.