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Finding the Fourth Proportional to 2,971.71, 4,101.12 and 1,645.47

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Solution

The fourth proportional to 2,971.71, 4,101.12 and 1,645.47 is: 2,270.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.71 : 4,101.12 = 1,645.47 : x
  2. Step 2: Convert to fraction form
    2,971.71/4,101.12 = 1,645.47/x
  3. Step 3: Cross multiply
    2,971.71x = 4,101.12 × 1,645.47
  4. Step 4: Simplify right side
    2,971.71x = 6,748,269.93
  5. Step 5: Solve for x
    x = 6,748,269.93/2,971.71
  6. Step 6: Final answer
    x = 2,270.84

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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.