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Finding the Fourth Proportional to 455,639.72, 628,780.30 and 251,704.64

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Solution

The fourth proportional to 455,639.72, 628,780.30 and 251,704.64 is: 347,351.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,639.72 : 628,780.30 = 251,704.64 : x
  2. Step 2: Convert to fraction form
    455,639.72/628,780.30 = 251,704.64/x
  3. Step 3: Cross multiply
    455,639.72x = 628,780.30 × 251,704.64
  4. Step 4: Simplify right side
    455,639.72x = 158,266,919,050.59
  5. Step 5: Solve for x
    x = 158,266,919,050.59/455,639.72
  6. Step 6: Final answer
    x = 347,351.01

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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.