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Finding the Fourth Proportional to 303,416.80, 455,125.20 and 208,938.40

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Solution

The fourth proportional to 303,416.80, 455,125.20 and 208,938.40 is: 313,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,416.80 : 455,125.20 = 208,938.40 : x
  2. Step 2: Convert to fraction form
    303,416.80/455,125.20 = 208,938.40/x
  3. Step 3: Cross multiply
    303,416.80x = 455,125.20 × 208,938.40
  4. Step 4: Simplify right side
    303,416.80x = 95,093,131,087.68
  5. Step 5: Solve for x
    x = 95,093,131,087.68/303,416.80
  6. Step 6: Final answer
    x = 313,407.60

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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.