Home / 1,638.99-2,259.84-1,339.13

Finding the Fourth Proportional to 1,638.99, 2,259.84 and 1,339.13

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Solution

The fourth proportional to 1,638.99, 2,259.84 and 1,339.13 is: 1,846.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.99 : 2,259.84 = 1,339.13 : x
  2. Step 2: Convert to fraction form
    1,638.99/2,259.84 = 1,339.13/x
  3. Step 3: Cross multiply
    1,638.99x = 2,259.84 × 1,339.13
  4. Step 4: Simplify right side
    1,638.99x = 3,026,209.97
  5. Step 5: Solve for x
    x = 3,026,209.97/1,638.99
  6. Step 6: Final answer
    x = 1,846.39

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1.5x scale

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.