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Finding the Fourth Proportional to 303,335.40, 455,003.10 and 280,525.80

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Solution

The fourth proportional to 303,335.40, 455,003.10 and 280,525.80 is: 420,788.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,335.40 : 455,003.10 = 280,525.80 : x
  2. Step 2: Convert to fraction form
    303,335.40/455,003.10 = 280,525.80/x
  3. Step 3: Cross multiply
    303,335.40x = 455,003.10 × 280,525.80
  4. Step 4: Simplify right side
    303,335.40x = 127,640,108,629.98
  5. Step 5: Solve for x
    x = 127,640,108,629.98/303,335.40
  6. Step 6: Final answer
    x = 420,788.70

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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.