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Finding the Fourth Proportional to 431,738.60, 646,830.30 and 265,332.20

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Solution

The fourth proportional to 431,738.60, 646,830.30 and 265,332.20 is: 397,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,738.60 : 646,830.30 = 265,332.20 : x
  2. Step 2: Convert to fraction form
    431,738.60/646,830.30 = 265,332.20/x
  3. Step 3: Cross multiply
    431,738.60x = 646,830.30 × 265,332.20
  4. Step 4: Simplify right side
    431,738.60x = 171,624,906,525.66
  5. Step 5: Solve for x
    x = 171,624,906,525.66/431,738.60
  6. Step 6: Final answer
    x = 397,520.41

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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.