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Finding the Fourth Proportional to 1,090.35, 1,506.06 and 1,028.79

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Solution

The fourth proportional to 1,090.35, 1,506.06 and 1,028.79 is: 1,421.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.35 : 1,506.06 = 1,028.79 : x
  2. Step 2: Convert to fraction form
    1,090.35/1,506.06 = 1,028.79/x
  3. Step 3: Cross multiply
    1,090.35x = 1,506.06 × 1,028.79
  4. Step 4: Simplify right side
    1,090.35x = 1,549,419.47
  5. Step 5: Solve for x
    x = 1,549,419.47/1,090.35
  6. Step 6: Final answer
    x = 1,421.03

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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.