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Finding the Fourth Proportional to 636,393.78, 878,226.63 and 349,932.30

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Solution

The fourth proportional to 636,393.78, 878,226.63 and 349,932.30 is: 482,908.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,393.78 : 878,226.63 = 349,932.30 : x
  2. Step 2: Convert to fraction form
    636,393.78/878,226.63 = 349,932.30/x
  3. Step 3: Cross multiply
    636,393.78x = 878,226.63 × 349,932.30
  4. Step 4: Simplify right side
    636,393.78x = 307,319,864,557.15
  5. Step 5: Solve for x
    x = 307,319,864,557.15/636,393.78
  6. Step 6: Final answer
    x = 482,908.34

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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.