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Finding the Fourth Proportional to 322,401.55, 484,118.70 and 256,390.60

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Solution

The fourth proportional to 322,401.55, 484,118.70 and 256,390.60 is: 384,996.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,401.55 : 484,118.70 = 256,390.60 : x
  2. Step 2: Convert to fraction form
    322,401.55/484,118.70 = 256,390.60/x
  3. Step 3: Cross multiply
    322,401.55x = 484,118.70 × 256,390.60
  4. Step 4: Simplify right side
    322,401.55x = 124,123,483,964.22
  5. Step 5: Solve for x
    x = 124,123,483,964.22/322,401.55
  6. Step 6: Final answer
    x = 384,996.55

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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.