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Finding the Fourth Proportional to 265,679.20, 398,518.80 and 213,191.20

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Solution

The fourth proportional to 265,679.20, 398,518.80 and 213,191.20 is: 319,786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,679.20 : 398,518.80 = 213,191.20 : x
  2. Step 2: Convert to fraction form
    265,679.20/398,518.80 = 213,191.20/x
  3. Step 3: Cross multiply
    265,679.20x = 398,518.80 × 213,191.20
  4. Step 4: Simplify right side
    265,679.20x = 84,960,701,194.56
  5. Step 5: Solve for x
    x = 84,960,701,194.56/265,679.20
  6. Step 6: Final answer
    x = 319,786.80

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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.