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Finding the Fourth Proportional to 322,512.55, 484,285.20 and 256,501.60

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Solution

The fourth proportional to 322,512.55, 484,285.20 and 256,501.60 is: 385,163.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,512.55 : 484,285.20 = 256,501.60 : x
  2. Step 2: Convert to fraction form
    322,512.55/484,285.20 = 256,501.60/x
  3. Step 3: Cross multiply
    322,512.55x = 484,285.20 × 256,501.60
  4. Step 4: Simplify right side
    322,512.55x = 124,219,928,656.32
  5. Step 5: Solve for x
    x = 124,219,928,656.32/322,512.55
  6. Step 6: Final answer
    x = 385,163.08

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1.5x scale

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.