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Finding the Fourth Proportional to 636,318.42, 878,125.32 and 349,840.50

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Solution

The fourth proportional to 636,318.42, 878,125.32 and 349,840.50 is: 482,783.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,318.42 : 878,125.32 = 349,840.50 : x
  2. Step 2: Convert to fraction form
    636,318.42/878,125.32 = 349,840.50/x
  3. Step 3: Cross multiply
    636,318.42x = 878,125.32 × 349,840.50
  4. Step 4: Simplify right side
    636,318.42x = 307,203,801,011.46
  5. Step 5: Solve for x
    x = 307,203,801,011.46/636,318.42
  6. Step 6: Final answer
    x = 482,783.13

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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.