Home / 1,878.21-2,817.10-491.69

Finding the Fourth Proportional to 1,878.21, 2,817.10 and 491.69

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Solution

The fourth proportional to 1,878.21, 2,817.10 and 491.69 is: 737.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.21 : 2,817.10 = 491.69 : x
  2. Step 2: Convert to fraction form
    1,878.21/2,817.10 = 491.69/x
  3. Step 3: Cross multiply
    1,878.21x = 2,817.10 × 491.69
  4. Step 4: Simplify right side
    1,878.21x = 1,385,139.90
  5. Step 5: Solve for x
    x = 1,385,139.90/1,878.21
  6. Step 6: Final answer
    x = 737.48

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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.