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Finding the Fourth Proportional to 303,405.85, 455,199.32 and 90,180.84

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Solution

The fourth proportional to 303,405.85, 455,199.32 and 90,180.84 is: 135,298.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,405.85 : 455,199.32 = 90,180.84 : x
  2. Step 2: Convert to fraction form
    303,405.85/455,199.32 = 90,180.84/x
  3. Step 3: Cross multiply
    303,405.85x = 455,199.32 × 90,180.84
  4. Step 4: Simplify right side
    303,405.85x = 41,050,257,045.03
  5. Step 5: Solve for x
    x = 41,050,257,045.03/303,405.85
  6. Step 6: Final answer
    x = 135,298.17

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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.