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Finding the Fourth Proportional to 490,411.80, 676,788.21 and 275,551.20

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Solution

The fourth proportional to 490,411.80, 676,788.21 and 275,551.20 is: 380,271.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,411.80 : 676,788.21 = 275,551.20 : x
  2. Step 2: Convert to fraction form
    490,411.80/676,788.21 = 275,551.20/x
  3. Step 3: Cross multiply
    490,411.80x = 676,788.21 × 275,551.20
  4. Step 4: Simplify right side
    490,411.80x = 186,489,803,411.35
  5. Step 5: Solve for x
    x = 186,489,803,411.35/490,411.80
  6. Step 6: Final answer
    x = 380,271.85

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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.