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Finding the Fourth Proportional to 455,240.64, 628,232.20 and 251,291.68

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Solution

The fourth proportional to 455,240.64, 628,232.20 and 251,291.68 is: 346,782.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,240.64 : 628,232.20 = 251,291.68 : x
  2. Step 2: Convert to fraction form
    455,240.64/628,232.20 = 251,291.68/x
  3. Step 3: Cross multiply
    455,240.64x = 628,232.20 × 251,291.68
  4. Step 4: Simplify right side
    455,240.64x = 157,869,527,716.61
  5. Step 5: Solve for x
    x = 157,869,527,716.61/455,240.64
  6. Step 6: Final answer
    x = 346,782.59

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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.