Home / 1,114.20-1,673.10-840.60

Finding the Fourth Proportional to 1,114.20, 1,673.10 and 840.60

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Solution

The fourth proportional to 1,114.20, 1,673.10 and 840.60 is: 1,262.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.20 : 1,673.10 = 840.60 : x
  2. Step 2: Convert to fraction form
    1,114.20/1,673.10 = 840.60/x
  3. Step 3: Cross multiply
    1,114.20x = 1,673.10 × 840.60
  4. Step 4: Simplify right side
    1,114.20x = 1,406,407.86
  5. Step 5: Solve for x
    x = 1,406,407.86/1,114.20
  6. Step 6: Final answer
    x = 1,262.26

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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.