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Finding the Fourth Proportional to 408,965.40, 613,448.10 and 109,492.20

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Solution

The fourth proportional to 408,965.40, 613,448.10 and 109,492.20 is: 164,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,965.40 : 613,448.10 = 109,492.20 : x
  2. Step 2: Convert to fraction form
    408,965.40/613,448.10 = 109,492.20/x
  3. Step 3: Cross multiply
    408,965.40x = 613,448.10 × 109,492.20
  4. Step 4: Simplify right side
    408,965.40x = 67,167,782,054.82
  5. Step 5: Solve for x
    x = 67,167,782,054.82/408,965.40
  6. Step 6: Final answer
    x = 164,238.30

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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.