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Finding the Fourth Proportional to 636,447.44, 878,267.40 and 349,979.60

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Solution

The fourth proportional to 636,447.44, 878,267.40 and 349,979.60 is: 482,955.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,447.44 : 878,267.40 = 349,979.60 : x
  2. Step 2: Convert to fraction form
    636,447.44/878,267.40 = 349,979.60/x
  3. Step 3: Cross multiply
    636,447.44x = 878,267.40 × 349,979.60
  4. Step 4: Simplify right side
    636,447.44x = 307,375,673,345.04
  5. Step 5: Solve for x
    x = 307,375,673,345.04/636,447.44
  6. Step 6: Final answer
    x = 482,955.31

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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.