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Finding the Fourth Proportional to 2,907.92, 4,012.74 and 1,729.08

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Solution

The fourth proportional to 2,907.92, 4,012.74 and 1,729.08 is: 2,386.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.92 : 4,012.74 = 1,729.08 : x
  2. Step 2: Convert to fraction form
    2,907.92/4,012.74 = 1,729.08/x
  3. Step 3: Cross multiply
    2,907.92x = 4,012.74 × 1,729.08
  4. Step 4: Simplify right side
    2,907.92x = 6,938,348.48
  5. Step 5: Solve for x
    x = 6,938,348.48/2,907.92
  6. Step 6: Final answer
    x = 2,386.02

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1.5x scale

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.