Home / 1,638.35-2,263.80-1,309.49

Finding the Fourth Proportional to 1,638.35, 2,263.80 and 1,309.49

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Solution

The fourth proportional to 1,638.35, 2,263.80 and 1,309.49 is: 1,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.35 : 2,263.80 = 1,309.49 : x
  2. Step 2: Convert to fraction form
    1,638.35/2,263.80 = 1,309.49/x
  3. Step 3: Cross multiply
    1,638.35x = 2,263.80 × 1,309.49
  4. Step 4: Simplify right side
    1,638.35x = 2,964,423.46
  5. Step 5: Solve for x
    x = 2,964,423.46/1,638.35
  6. Step 6: Final answer
    x = 1,809.40

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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.