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Finding the Fourth Proportional to 490,281.45, 676,393.85 and 283,511.63

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Solution

The fourth proportional to 490,281.45, 676,393.85 and 283,511.63 is: 391,133.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,281.45 : 676,393.85 = 283,511.63 : x
  2. Step 2: Convert to fraction form
    490,281.45/676,393.85 = 283,511.63/x
  3. Step 3: Cross multiply
    490,281.45x = 676,393.85 × 283,511.63
  4. Step 4: Simplify right side
    490,281.45x = 191,765,526,922.89
  5. Step 5: Solve for x
    x = 191,765,526,922.89/490,281.45
  6. Step 6: Final answer
    x = 391,133.55

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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.