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Finding the Fourth Proportional to 445,809, 668,821.54 and 256,390.60

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Solution

The fourth proportional to 445,809, 668,821.54 and 256,390.60 is: 384,648.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,809 : 668,821.54 = 256,390.60 : x
  2. Step 2: Convert to fraction form
    445,809/668,821.54 = 256,390.60/x
  3. Step 3: Cross multiply
    445,809x = 668,821.54 × 256,390.60
  4. Step 4: Simplify right side
    445,809x = 171,479,555,933.52
  5. Step 5: Solve for x
    x = 171,479,555,933.52/445,809
  6. Step 6: Final answer
    x = 384,648.04

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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.