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Finding the Fourth Proportional to 1,601.49, 2,208.49 and 972.12

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Solution

The fourth proportional to 1,601.49, 2,208.49 and 972.12 is: 1,340.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,601.49 : 2,208.49 = 972.12 : x
  2. Step 2: Convert to fraction form
    1,601.49/2,208.49 = 972.12/x
  3. Step 3: Cross multiply
    1,601.49x = 2,208.49 × 972.12
  4. Step 4: Simplify right side
    1,601.49x = 2,146,917.30
  5. Step 5: Solve for x
    x = 2,146,917.30/1,601.49
  6. Step 6: Final answer
    x = 1,340.57

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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.