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Finding the Fourth Proportional to 4,991.18, 7,486.78 and 1,871.06

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Solution

The fourth proportional to 4,991.18, 7,486.78 and 1,871.06 is: 2,806.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.18 : 7,486.78 = 1,871.06 : x
  2. Step 2: Convert to fraction form
    4,991.18/7,486.78 = 1,871.06/x
  3. Step 3: Cross multiply
    4,991.18x = 7,486.78 × 1,871.06
  4. Step 4: Simplify right side
    4,991.18x = 14,008,214.59
  5. Step 5: Solve for x
    x = 14,008,214.59/4,991.18
  6. Step 6: Final answer
    x = 2,806.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.