Home / 1,483.12-2,221.70-691.36

Finding the Fourth Proportional to 1,483.12, 2,221.70 and 691.36

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Solution

The fourth proportional to 1,483.12, 2,221.70 and 691.36 is: 1,035.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,483.12 : 2,221.70 = 691.36 : x
  2. Step 2: Convert to fraction form
    1,483.12/2,221.70 = 691.36/x
  3. Step 3: Cross multiply
    1,483.12x = 2,221.70 × 691.36
  4. Step 4: Simplify right side
    1,483.12x = 1,535,979.95
  5. Step 5: Solve for x
    x = 1,535,979.95/1,483.12
  6. Step 6: Final answer
    x = 1,035.64

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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.