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Finding the Fourth Proportional to 259,276.40, 388,914.60 and 111,532.40

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Solution

The fourth proportional to 259,276.40, 388,914.60 and 111,532.40 is: 167,298.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,276.40 : 388,914.60 = 111,532.40 : x
  2. Step 2: Convert to fraction form
    259,276.40/388,914.60 = 111,532.40/x
  3. Step 3: Cross multiply
    259,276.40x = 388,914.60 × 111,532.40
  4. Step 4: Simplify right side
    259,276.40x = 43,376,578,733.04
  5. Step 5: Solve for x
    x = 43,376,578,733.04/259,276.40
  6. Step 6: Final answer
    x = 167,298.60

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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.