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Finding the Fourth Proportional to 256,513.76, 353,988.08 and 143,336.48

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Solution

The fourth proportional to 256,513.76, 353,988.08 and 143,336.48 is: 197,803.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,513.76 : 353,988.08 = 143,336.48 : x
  2. Step 2: Convert to fraction form
    256,513.76/353,988.08 = 143,336.48/x
  3. Step 3: Cross multiply
    256,513.76x = 353,988.08 × 143,336.48
  4. Step 4: Simplify right side
    256,513.76x = 50,739,405,349.16
  5. Step 5: Solve for x
    x = 50,739,405,349.16/256,513.76
  6. Step 6: Final answer
    x = 197,803.83

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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.