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Finding the Fourth Proportional to 393,428.68, 590,129.01 and 127,182.22

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Solution

The fourth proportional to 393,428.68, 590,129.01 and 127,182.22 is: 190,768.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,428.68 : 590,129.01 = 127,182.22 : x
  2. Step 2: Convert to fraction form
    393,428.68/590,129.01 = 127,182.22/x
  3. Step 3: Cross multiply
    393,428.68x = 590,129.01 × 127,182.22
  4. Step 4: Simplify right side
    393,428.68x = 75,053,916,102.88
  5. Step 5: Solve for x
    x = 75,053,916,102.88/393,428.68
  6. Step 6: Final answer
    x = 190,768.80

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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.