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Finding the Fourth Proportional to 490,930.84, 677,480.28 and 276,066.32

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Solution

The fourth proportional to 490,930.84, 677,480.28 and 276,066.32 is: 380,969.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,930.84 : 677,480.28 = 276,066.32 : x
  2. Step 2: Convert to fraction form
    490,930.84/677,480.28 = 276,066.32/x
  3. Step 3: Cross multiply
    490,930.84x = 677,480.28 × 276,066.32
  4. Step 4: Simplify right side
    490,930.84x = 187,029,487,772.17
  5. Step 5: Solve for x
    x = 187,029,487,772.17/490,930.84
  6. Step 6: Final answer
    x = 380,969.12

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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.