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Finding the Fourth Proportional to 408,548.88, 612,921.69 and 128,066.13

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Solution

The fourth proportional to 408,548.88, 612,921.69 and 128,066.13 is: 192,130.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,548.88 : 612,921.69 = 128,066.13 : x
  2. Step 2: Convert to fraction form
    408,548.88/612,921.69 = 128,066.13/x
  3. Step 3: Cross multiply
    408,548.88x = 612,921.69 × 128,066.13
  4. Step 4: Simplify right side
    408,548.88x = 78,494,508,831.36
  5. Step 5: Solve for x
    x = 78,494,508,831.36/408,548.88
  6. Step 6: Final answer
    x = 192,130.03

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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.