Home / 1,242.10-1,861.90-461.60

Finding the Fourth Proportional to 1,242.10, 1,861.90 and 461.60

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Solution

The fourth proportional to 1,242.10, 1,861.90 and 461.60 is: 691.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.10 : 1,861.90 = 461.60 : x
  2. Step 2: Convert to fraction form
    1,242.10/1,861.90 = 461.60/x
  3. Step 3: Cross multiply
    1,242.10x = 1,861.90 × 461.60
  4. Step 4: Simplify right side
    1,242.10x = 859,453.04
  5. Step 5: Solve for x
    x = 859,453.04/1,242.10
  6. Step 6: Final answer
    x = 691.94

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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.