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Finding the Fourth Proportional to 483,930.40, 725,895.60 and 421,722.40

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Solution

The fourth proportional to 483,930.40, 725,895.60 and 421,722.40 is: 632,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,930.40 : 725,895.60 = 421,722.40 : x
  2. Step 2: Convert to fraction form
    483,930.40/725,895.60 = 421,722.40/x
  3. Step 3: Cross multiply
    483,930.40x = 725,895.60 × 421,722.40
  4. Step 4: Simplify right side
    483,930.40x = 306,126,434,581.44
  5. Step 5: Solve for x
    x = 306,126,434,581.44/483,930.40
  6. Step 6: Final answer
    x = 632,583.60

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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.