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Finding the Fourth Proportional to 3,157, 4,357.56 and 1,898.47

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Solution

The fourth proportional to 3,157, 4,357.56 and 1,898.47 is: 2,620.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157 : 4,357.56 = 1,898.47 : x
  2. Step 2: Convert to fraction form
    3,157/4,357.56 = 1,898.47/x
  3. Step 3: Cross multiply
    3,157x = 4,357.56 × 1,898.47
  4. Step 4: Simplify right side
    3,157x = 8,272,696.93
  5. Step 5: Solve for x
    x = 8,272,696.93/3,157
  6. Step 6: Final answer
    x = 2,620.43

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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.