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Finding the Fourth Proportional to 300,409.34, 450,556.65 and 90,047.28

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Solution

The fourth proportional to 300,409.34, 450,556.65 and 90,047.28 is: 135,053.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,409.34 : 450,556.65 = 90,047.28 : x
  2. Step 2: Convert to fraction form
    300,409.34/450,556.65 = 90,047.28/x
  3. Step 3: Cross multiply
    300,409.34x = 450,556.65 × 90,047.28
  4. Step 4: Simplify right side
    300,409.34x = 40,571,400,818.41
  5. Step 5: Solve for x
    x = 40,571,400,818.41/300,409.34
  6. Step 6: Final answer
    x = 135,053.73

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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.