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Finding the Fourth Proportional to 455,659.51, 628,815.40 and 251,706.20

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Solution

The fourth proportional to 455,659.51, 628,815.40 and 251,706.20 is: 347,357.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,659.51 : 628,815.40 = 251,706.20 : x
  2. Step 2: Convert to fraction form
    455,659.51/628,815.40 = 251,706.20/x
  3. Step 3: Cross multiply
    455,659.51x = 628,815.40 × 251,706.20
  4. Step 4: Simplify right side
    455,659.51x = 158,276,733,576.95
  5. Step 5: Solve for x
    x = 158,276,733,576.95/455,659.51
  6. Step 6: Final answer
    x = 347,357.47

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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.