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Finding the Fourth Proportional to 2,991.61, 4,130.18 and 2,659.07

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Solution

The fourth proportional to 2,991.61, 4,130.18 and 2,659.07 is: 3,671.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.61 : 4,130.18 = 2,659.07 : x
  2. Step 2: Convert to fraction form
    2,991.61/4,130.18 = 2,659.07/x
  3. Step 3: Cross multiply
    2,991.61x = 4,130.18 × 2,659.07
  4. Step 4: Simplify right side
    2,991.61x = 10,982,448.38
  5. Step 5: Solve for x
    x = 10,982,448.38/2,991.61
  6. Step 6: Final answer
    x = 3,671.09

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Double scale
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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.