Home / 1,421.85-2,133.08-448.02

Finding the Fourth Proportional to 1,421.85, 2,133.08 and 448.02

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Solution

The fourth proportional to 1,421.85, 2,133.08 and 448.02 is: 672.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.85 : 2,133.08 = 448.02 : x
  2. Step 2: Convert to fraction form
    1,421.85/2,133.08 = 448.02/x
  3. Step 3: Cross multiply
    1,421.85x = 2,133.08 × 448.02
  4. Step 4: Simplify right side
    1,421.85x = 955,660.26
  5. Step 5: Solve for x
    x = 955,660.26/1,421.85
  6. Step 6: Final answer
    x = 672.12

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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.