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Finding the Fourth Proportional to 455,361.43, 628,436.37 and 251,432.59

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Solution

The fourth proportional to 455,361.43, 628,436.37 and 251,432.59 is: 346,997.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,361.43 : 628,436.37 = 251,432.59 : x
  2. Step 2: Convert to fraction form
    455,361.43/628,436.37 = 251,432.59/x
  3. Step 3: Cross multiply
    455,361.43x = 628,436.37 × 251,432.59
  4. Step 4: Simplify right side
    455,361.43x = 158,009,384,159.30
  5. Step 5: Solve for x
    x = 158,009,384,159.30/455,361.43
  6. Step 6: Final answer
    x = 346,997.73

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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.