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Finding the Fourth Proportional to 455,399.16, 628,471.86 and 251,478.84

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Solution

The fourth proportional to 455,399.16, 628,471.86 and 251,478.84 is: 347,052.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,399.16 : 628,471.86 = 251,478.84 : x
  2. Step 2: Convert to fraction form
    455,399.16/628,471.86 = 251,478.84/x
  3. Step 3: Cross multiply
    455,399.16x = 628,471.86 × 251,478.84
  4. Step 4: Simplify right side
    455,399.16x = 158,047,374,325.44
  5. Step 5: Solve for x
    x = 158,047,374,325.44/455,399.16
  6. Step 6: Final answer
    x = 347,052.41

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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.