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Finding the Fourth Proportional to 490,118.92, 676,284.78 and 306,335.82

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Solution

The fourth proportional to 490,118.92, 676,284.78 and 306,335.82 is: 422,693.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,118.92 : 676,284.78 = 306,335.82 : x
  2. Step 2: Convert to fraction form
    490,118.92/676,284.78 = 306,335.82/x
  3. Step 3: Cross multiply
    490,118.92x = 676,284.78 × 306,335.82
  4. Step 4: Simplify right side
    490,118.92x = 207,170,249,253.40
  5. Step 5: Solve for x
    x = 207,170,249,253.40/490,118.92
  6. Step 6: Final answer
    x = 422,693.84

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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.