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Finding the Fourth Proportional to 636,830.91, 878,888.78 and 475,405.61

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Solution

The fourth proportional to 636,830.91, 878,888.78 and 475,405.61 is: 656,106.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,830.91 : 878,888.78 = 475,405.61 : x
  2. Step 2: Convert to fraction form
    636,830.91/878,888.78 = 475,405.61/x
  3. Step 3: Cross multiply
    636,830.91x = 878,888.78 × 475,405.61
  4. Step 4: Simplify right side
    636,830.91x = 417,828,651,589.36
  5. Step 5: Solve for x
    x = 417,828,651,589.36/636,830.91
  6. Step 6: Final answer
    x = 656,106.11

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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.