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Finding the Fourth Proportional to 2,909, 4,012.70 and 1,730

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Solution

The fourth proportional to 2,909, 4,012.70 and 1,730 is: 2,386.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909 : 4,012.70 = 1,730 : x
  2. Step 2: Convert to fraction form
    2,909/4,012.70 = 1,730/x
  3. Step 3: Cross multiply
    2,909x = 4,012.70 × 1,730
  4. Step 4: Simplify right side
    2,909x = 6,941,971
  5. Step 5: Solve for x
    x = 6,941,971/2,909
  6. Step 6: Final answer
    x = 2,386.38

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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.