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Finding the Fourth Proportional to 289,809.36, 434,629.80 and 112,276.80

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Solution

The fourth proportional to 289,809.36, 434,629.80 and 112,276.80 is: 168,382.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,809.36 : 434,629.80 = 112,276.80 : x
  2. Step 2: Convert to fraction form
    289,809.36/434,629.80 = 112,276.80/x
  3. Step 3: Cross multiply
    289,809.36x = 434,629.80 × 112,276.80
  4. Step 4: Simplify right side
    289,809.36x = 48,798,843,128.64
  5. Step 5: Solve for x
    x = 48,798,843,128.64/289,809.36
  6. Step 6: Final answer
    x = 168,382.56

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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.