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Finding the Fourth Proportional to 303,479.40, 455,279.85 and 90,246.90

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Solution

The fourth proportional to 303,479.40, 455,279.85 and 90,246.90 is: 135,388.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,479.40 : 455,279.85 = 90,246.90 : x
  2. Step 2: Convert to fraction form
    303,479.40/455,279.85 = 90,246.90/x
  3. Step 3: Cross multiply
    303,479.40x = 455,279.85 × 90,246.90
  4. Step 4: Simplify right side
    303,479.40x = 41,087,595,094.97
  5. Step 5: Solve for x
    x = 41,087,595,094.97/303,479.40
  6. Step 6: Final answer
    x = 135,388.42

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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.