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Finding the Fourth Proportional to 2,907.89, 4,012.49 and 1,728.53

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Solution

The fourth proportional to 2,907.89, 4,012.49 and 1,728.53 is: 2,385.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.89 : 4,012.49 = 1,728.53 : x
  2. Step 2: Convert to fraction form
    2,907.89/4,012.49 = 1,728.53/x
  3. Step 3: Cross multiply
    2,907.89x = 4,012.49 × 1,728.53
  4. Step 4: Simplify right side
    2,907.89x = 6,935,693.60
  5. Step 5: Solve for x
    x = 6,935,693.60/2,907.89
  6. Step 6: Final answer
    x = 2,385.13

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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.