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Finding the Fourth Proportional to 408,829, 613,249.02 and 128,346.28

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Solution

The fourth proportional to 408,829, 613,249.02 and 128,346.28 is: 192,521.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,829 : 613,249.02 = 128,346.28 : x
  2. Step 2: Convert to fraction form
    408,829/613,249.02 = 128,346.28/x
  3. Step 3: Cross multiply
    408,829x = 613,249.02 × 128,346.28
  4. Step 4: Simplify right side
    408,829x = 78,708,230,430.65
  5. Step 5: Solve for x
    x = 78,708,230,430.65/408,829
  6. Step 6: Final answer
    x = 192,521.15

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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.