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Finding the Fourth Proportional to 210,493.42, 315,789.44 and 143,964.88

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Solution

The fourth proportional to 210,493.42, 315,789.44 and 143,964.88 is: 215,981.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,493.42 : 315,789.44 = 143,964.88 : x
  2. Step 2: Convert to fraction form
    210,493.42/315,789.44 = 143,964.88/x
  3. Step 3: Cross multiply
    210,493.42x = 315,789.44 × 143,964.88
  4. Step 4: Simplify right side
    210,493.42x = 45,462,587,325.57
  5. Step 5: Solve for x
    x = 45,462,587,325.57/210,493.42
  6. Step 6: Final answer
    x = 215,981.04

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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.