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Finding the Fourth Proportional to 372,166, 513,573.44 and 211,031.90

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Solution

The fourth proportional to 372,166, 513,573.44 and 211,031.90 is: 291,215.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,166 : 513,573.44 = 211,031.90 : x
  2. Step 2: Convert to fraction form
    372,166/513,573.44 = 211,031.90/x
  3. Step 3: Cross multiply
    372,166x = 513,573.44 × 211,031.90
  4. Step 4: Simplify right side
    372,166x = 108,380,378,832.74
  5. Step 5: Solve for x
    x = 108,380,378,832.74/372,166
  6. Step 6: Final answer
    x = 291,215.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.