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Finding the Fourth Proportional to 325,307.40, 487,936.80 and 135,718.80

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Solution

The fourth proportional to 325,307.40, 487,936.80 and 135,718.80 is: 203,568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,307.40 : 487,936.80 = 135,718.80 : x
  2. Step 2: Convert to fraction form
    325,307.40/487,936.80 = 135,718.80/x
  3. Step 3: Cross multiply
    325,307.40x = 487,936.80 × 135,718.80
  4. Step 4: Simplify right side
    325,307.40x = 66,222,196,971.84
  5. Step 5: Solve for x
    x = 66,222,196,971.84/325,307.40
  6. Step 6: Final answer
    x = 203,568.06

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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.