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Finding the Fourth Proportional to 455,489.32, 628,743 and 274,209.68

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Solution

The fourth proportional to 455,489.32, 628,743 and 274,209.68 is: 378,510.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,489.32 : 628,743 = 274,209.68 : x
  2. Step 2: Convert to fraction form
    455,489.32/628,743 = 274,209.68/x
  3. Step 3: Cross multiply
    455,489.32x = 628,743 × 274,209.68
  4. Step 4: Simplify right side
    455,489.32x = 172,407,416,832.24
  5. Step 5: Solve for x
    x = 172,407,416,832.24/455,489.32
  6. Step 6: Final answer
    x = 378,510.34

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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.