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Finding the Fourth Proportional to 408,421.37, 612,661.32 and 108,900.38

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Solution

The fourth proportional to 408,421.37, 612,661.32 and 108,900.38 is: 163,358.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,421.37 : 612,661.32 = 108,900.38 : x
  2. Step 2: Convert to fraction form
    408,421.37/612,661.32 = 108,900.38/x
  3. Step 3: Cross multiply
    408,421.37x = 612,661.32 × 108,900.38
  4. Step 4: Simplify right side
    408,421.37x = 66,719,052,090.95
  5. Step 5: Solve for x
    x = 66,719,052,090.95/408,421.37
  6. Step 6: Final answer
    x = 163,358.38

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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.