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Finding the Fourth Proportional to 621,071.83, 857,112.87 and 345,458.80

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Solution

The fourth proportional to 621,071.83, 857,112.87 and 345,458.80 is: 476,751.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,071.83 : 857,112.87 = 345,458.80 : x
  2. Step 2: Convert to fraction form
    621,071.83/857,112.87 = 345,458.80/x
  3. Step 3: Cross multiply
    621,071.83x = 857,112.87 × 345,458.80
  4. Step 4: Simplify right side
    621,071.83x = 296,097,183,534.76
  5. Step 5: Solve for x
    x = 296,097,183,534.76/621,071.83
  6. Step 6: Final answer
    x = 476,751.91

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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.