Home / 1,218.40-1,677.56-1,090.60

Finding the Fourth Proportional to 1,218.40, 1,677.56 and 1,090.60

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Solution

The fourth proportional to 1,218.40, 1,677.56 and 1,090.60 is: 1,501.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.40 : 1,677.56 = 1,090.60 : x
  2. Step 2: Convert to fraction form
    1,218.40/1,677.56 = 1,090.60/x
  3. Step 3: Cross multiply
    1,218.40x = 1,677.56 × 1,090.60
  4. Step 4: Simplify right side
    1,218.40x = 1,829,546.94
  5. Step 5: Solve for x
    x = 1,829,546.94/1,218.40
  6. Step 6: Final answer
    x = 1,501.60

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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.