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Finding the Fourth Proportional to 2,518.40, 3,776.64 and 763.04

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Solution

The fourth proportional to 2,518.40, 3,776.64 and 763.04 is: 1,144.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,518.40 : 3,776.64 = 763.04 : x
  2. Step 2: Convert to fraction form
    2,518.40/3,776.64 = 763.04/x
  3. Step 3: Cross multiply
    2,518.40x = 3,776.64 × 763.04
  4. Step 4: Simplify right side
    2,518.40x = 2,881,727.39
  5. Step 5: Solve for x
    x = 2,881,727.39/2,518.40
  6. Step 6: Final answer
    x = 1,144.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.