Home / 1,421.51-2,132.47-447.69

Finding the Fourth Proportional to 1,421.51, 2,132.47 and 447.69

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Solution

The fourth proportional to 1,421.51, 2,132.47 and 447.69 is: 671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.51 : 2,132.47 = 447.69 : x
  2. Step 2: Convert to fraction form
    1,421.51/2,132.47 = 447.69/x
  3. Step 3: Cross multiply
    1,421.51x = 2,132.47 × 447.69
  4. Step 4: Simplify right side
    1,421.51x = 954,685.49
  5. Step 5: Solve for x
    x = 954,685.49/1,421.51
  6. Step 6: Final answer
    x = 671.60

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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.