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Finding the Fourth Proportional to 2,636.75, 3,638.79 and 1,457.87

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Solution

The fourth proportional to 2,636.75, 3,638.79 and 1,457.87 is: 2,011.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.75 : 3,638.79 = 1,457.87 : x
  2. Step 2: Convert to fraction form
    2,636.75/3,638.79 = 1,457.87/x
  3. Step 3: Cross multiply
    2,636.75x = 3,638.79 × 1,457.87
  4. Step 4: Simplify right side
    2,636.75x = 5,304,864.58
  5. Step 5: Solve for x
    x = 5,304,864.58/2,636.75
  6. Step 6: Final answer
    x = 2,011.89

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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.