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Finding the Fourth Proportional to 393,129.25, 589,693.88 and 112,646.50

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Solution

The fourth proportional to 393,129.25, 589,693.88 and 112,646.50 is: 168,969.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,129.25 : 589,693.88 = 112,646.50 : x
  2. Step 2: Convert to fraction form
    393,129.25/589,693.88 = 112,646.50/x
  3. Step 3: Cross multiply
    393,129.25x = 589,693.88 × 112,646.50
  4. Step 4: Simplify right side
    393,129.25x = 66,426,951,090.19
  5. Step 5: Solve for x
    x = 66,426,951,090.19/393,129.25
  6. Step 6: Final answer
    x = 168,969.75

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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.