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Finding the Fourth Proportional to 372,125.64, 513,517.88 and 210,991.60

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Solution

The fourth proportional to 372,125.64, 513,517.88 and 210,991.60 is: 291,159.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,125.64 : 513,517.88 = 210,991.60 : x
  2. Step 2: Convert to fraction form
    372,125.64/513,517.88 = 210,991.60/x
  3. Step 3: Cross multiply
    372,125.64x = 513,517.88 × 210,991.60
  4. Step 4: Simplify right side
    372,125.64x = 108,347,959,129.81
  5. Step 5: Solve for x
    x = 108,347,959,129.81/372,125.64
  6. Step 6: Final answer
    x = 291,159.62

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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.