Home / 1,638.85-2,264.49-1,309.99

Finding the Fourth Proportional to 1,638.85, 2,264.49 and 1,309.99

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Solution

The fourth proportional to 1,638.85, 2,264.49 and 1,309.99 is: 1,810.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.85 : 2,264.49 = 1,309.99 : x
  2. Step 2: Convert to fraction form
    1,638.85/2,264.49 = 1,309.99/x
  3. Step 3: Cross multiply
    1,638.85x = 2,264.49 × 1,309.99
  4. Step 4: Simplify right side
    1,638.85x = 2,966,459.26
  5. Step 5: Solve for x
    x = 2,966,459.26/1,638.85
  6. Step 6: Final answer
    x = 1,810.09

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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.