Home / 1,459.96-2,189.68-669.12

Finding the Fourth Proportional to 1,459.96, 2,189.68 and 669.12

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Solution

The fourth proportional to 1,459.96, 2,189.68 and 669.12 is: 1,003.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.96 : 2,189.68 = 669.12 : x
  2. Step 2: Convert to fraction form
    1,459.96/2,189.68 = 669.12/x
  3. Step 3: Cross multiply
    1,459.96x = 2,189.68 × 669.12
  4. Step 4: Simplify right side
    1,459.96x = 1,465,158.68
  5. Step 5: Solve for x
    x = 1,465,158.68/1,459.96
  6. Step 6: Final answer
    x = 1,003.56

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1.5x scale

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.