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Finding the Fourth Proportional to 455,624.21, 628,758.90 and 251,689.16

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Solution

The fourth proportional to 455,624.21, 628,758.90 and 251,689.16 is: 347,329.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,624.21 : 628,758.90 = 251,689.16 : x
  2. Step 2: Convert to fraction form
    455,624.21/628,758.90 = 251,689.16/x
  3. Step 3: Cross multiply
    455,624.21x = 628,758.90 × 251,689.16
  4. Step 4: Simplify right side
    455,624.21x = 158,251,796,239.73
  5. Step 5: Solve for x
    x = 158,251,796,239.73/455,624.21
  6. Step 6: Final answer
    x = 347,329.65

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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.