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Finding the Fourth Proportional to 213,725.70, 320,588.55 and 210,615.30

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Solution

The fourth proportional to 213,725.70, 320,588.55 and 210,615.30 is: 315,922.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,725.70 : 320,588.55 = 210,615.30 : x
  2. Step 2: Convert to fraction form
    213,725.70/320,588.55 = 210,615.30/x
  3. Step 3: Cross multiply
    213,725.70x = 320,588.55 × 210,615.30
  4. Step 4: Simplify right side
    213,725.70x = 67,520,853,634.82
  5. Step 5: Solve for x
    x = 67,520,853,634.82/213,725.70
  6. Step 6: Final answer
    x = 315,922.95

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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.