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Finding the Fourth Proportional to 393,503.40, 590,109.30 and 127,272.60

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Solution

The fourth proportional to 393,503.40, 590,109.30 and 127,272.60 is: 190,861.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,503.40 : 590,109.30 = 127,272.60 : x
  2. Step 2: Convert to fraction form
    393,503.40/590,109.30 = 127,272.60/x
  3. Step 3: Cross multiply
    393,503.40x = 590,109.30 × 127,272.60
  4. Step 4: Simplify right side
    393,503.40x = 75,104,744,895.18
  5. Step 5: Solve for x
    x = 75,104,744,895.18/393,503.40
  6. Step 6: Final answer
    x = 190,861.74

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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.