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Finding the Fourth Proportional to 490,164.76, 676,438.86 and 275,320.36

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Solution

The fourth proportional to 490,164.76, 676,438.86 and 275,320.36 is: 379,948.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,164.76 : 676,438.86 = 275,320.36 : x
  2. Step 2: Convert to fraction form
    490,164.76/676,438.86 = 275,320.36/x
  3. Step 3: Cross multiply
    490,164.76x = 676,438.86 × 275,320.36
  4. Step 4: Simplify right side
    490,164.76x = 186,237,390,453.19
  5. Step 5: Solve for x
    x = 186,237,390,453.19/490,164.76
  6. Step 6: Final answer
    x = 379,948.55

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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.