Home / 1,421.12-1,962.96-1,090.64

Finding the Fourth Proportional to 1,421.12, 1,962.96 and 1,090.64

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Solution

The fourth proportional to 1,421.12, 1,962.96 and 1,090.64 is: 1,506.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.12 : 1,962.96 = 1,090.64 : x
  2. Step 2: Convert to fraction form
    1,421.12/1,962.96 = 1,090.64/x
  3. Step 3: Cross multiply
    1,421.12x = 1,962.96 × 1,090.64
  4. Step 4: Simplify right side
    1,421.12x = 2,140,882.69
  5. Step 5: Solve for x
    x = 2,140,882.69/1,421.12
  6. Step 6: Final answer
    x = 1,506.48

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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.