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Finding the Fourth Proportional to 636,674.12, 878,557.83 and 374,988.64

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Solution

The fourth proportional to 636,674.12, 878,557.83 and 374,988.64 is: 517,453.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,674.12 : 878,557.83 = 374,988.64 : x
  2. Step 2: Convert to fraction form
    636,674.12/878,557.83 = 374,988.64/x
  3. Step 3: Cross multiply
    636,674.12x = 878,557.83 × 374,988.64
  4. Step 4: Simplify right side
    636,674.12x = 329,449,199,565.32
  5. Step 5: Solve for x
    x = 329,449,199,565.32/636,674.12
  6. Step 6: Final answer
    x = 517,453.42

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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.