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Finding the Fourth Proportional to 256,480.75, 353,943.57 and 143,303.50

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Solution

The fourth proportional to 256,480.75, 353,943.57 and 143,303.50 is: 197,758.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,480.75 : 353,943.57 = 143,303.50 : x
  2. Step 2: Convert to fraction form
    256,480.75/353,943.57 = 143,303.50/x
  3. Step 3: Cross multiply
    256,480.75x = 353,943.57 × 143,303.50
  4. Step 4: Simplify right side
    256,480.75x = 50,721,352,383.50
  5. Step 5: Solve for x
    x = 50,721,352,383.50/256,480.75
  6. Step 6: Final answer
    x = 197,758.91

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1.5x scale

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.