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Finding the Fourth Proportional to 455,400, 628,444.22 and 251,445.84

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Solution

The fourth proportional to 455,400, 628,444.22 and 251,445.84 is: 346,990.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,400 : 628,444.22 = 251,445.84 : x
  2. Step 2: Convert to fraction form
    455,400/628,444.22 = 251,445.84/x
  3. Step 3: Cross multiply
    455,400x = 628,444.22 × 251,445.84
  4. Step 4: Simplify right side
    455,400x = 158,019,684,791.05
  5. Step 5: Solve for x
    x = 158,019,684,791.05/455,400
  6. Step 6: Final answer
    x = 346,990.96

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1.5x scale

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.