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Finding the Fourth Proportional to 256,480.53, 353,935.89 and 143,303.28

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Solution

The fourth proportional to 256,480.53, 353,935.89 and 143,303.28 is: 197,754.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,480.53 : 353,935.89 = 143,303.28 : x
  2. Step 2: Convert to fraction form
    256,480.53/353,935.89 = 143,303.28/x
  3. Step 3: Cross multiply
    256,480.53x = 353,935.89 × 143,303.28
  4. Step 4: Simplify right side
    256,480.53x = 50,720,173,946.72
  5. Step 5: Solve for x
    x = 50,720,173,946.72/256,480.53
  6. Step 6: Final answer
    x = 197,754.48

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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.