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Finding the Fourth Proportional to 490,394.70, 676,745.28 and 275,534.64

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Solution

The fourth proportional to 490,394.70, 676,745.28 and 275,534.64 is: 380,238.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,394.70 : 676,745.28 = 275,534.64 : x
  2. Step 2: Convert to fraction form
    490,394.70/676,745.28 = 275,534.64/x
  3. Step 3: Cross multiply
    490,394.70x = 676,745.28 × 275,534.64
  4. Step 4: Simplify right side
    490,394.70x = 186,466,767,096.50
  5. Step 5: Solve for x
    x = 186,466,767,096.50/490,394.70
  6. Step 6: Final answer
    x = 380,238.14

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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.