Home / 2,921.69-4,031.90-1,802.18

Finding the Fourth Proportional to 2,921.69, 4,031.90 and 1,802.18

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Solution

The fourth proportional to 2,921.69, 4,031.90 and 1,802.18 is: 2,486.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.69 : 4,031.90 = 1,802.18 : x
  2. Step 2: Convert to fraction form
    2,921.69/4,031.90 = 1,802.18/x
  3. Step 3: Cross multiply
    2,921.69x = 4,031.90 × 1,802.18
  4. Step 4: Simplify right side
    2,921.69x = 7,266,224.13
  5. Step 5: Solve for x
    x = 7,266,224.13/2,921.69
  6. Step 6: Final answer
    x = 2,486.99

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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.