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Finding the Fourth Proportional to 256,513.82, 353,988.51 and 143,336.57

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Solution

The fourth proportional to 256,513.82, 353,988.51 and 143,336.57 is: 197,804.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,513.82 : 353,988.51 = 143,336.57 : x
  2. Step 2: Convert to fraction form
    256,513.82/353,988.51 = 143,336.57/x
  3. Step 3: Cross multiply
    256,513.82x = 353,988.51 × 143,336.57
  4. Step 4: Simplify right side
    256,513.82x = 50,739,498,842.81
  5. Step 5: Solve for x
    x = 50,739,498,842.81/256,513.82
  6. Step 6: Final answer
    x = 197,804.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.