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Finding the Fourth Proportional to 393,460.80, 589,899.60 and 168,637.20

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Solution

The fourth proportional to 393,460.80, 589,899.60 and 168,637.20 is: 252,830.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,460.80 : 589,899.60 = 168,637.20 : x
  2. Step 2: Convert to fraction form
    393,460.80/589,899.60 = 168,637.20/x
  3. Step 3: Cross multiply
    393,460.80x = 589,899.60 × 168,637.20
  4. Step 4: Simplify right side
    393,460.80x = 99,479,016,825.12
  5. Step 5: Solve for x
    x = 99,479,016,825.12/393,460.80
  6. Step 6: Final answer
    x = 252,830.82

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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.