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Finding the Fourth Proportional to 263,518.56, 395,316 and 85,988.64

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Solution

The fourth proportional to 263,518.56, 395,316 and 85,988.64 is: 128,995.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,518.56 : 395,316 = 85,988.64 : x
  2. Step 2: Convert to fraction form
    263,518.56/395,316 = 85,988.64/x
  3. Step 3: Cross multiply
    263,518.56x = 395,316 × 85,988.64
  4. Step 4: Simplify right side
    263,518.56x = 33,992,685,210.24
  5. Step 5: Solve for x
    x = 33,992,685,210.24/263,518.56
  6. Step 6: Final answer
    x = 128,995.41

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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.