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Finding the Fourth Proportional to 636,489.59, 878,140.65 and 360,817.88

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Solution

The fourth proportional to 636,489.59, 878,140.65 and 360,817.88 is: 497,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,489.59 : 878,140.65 = 360,817.88 : x
  2. Step 2: Convert to fraction form
    636,489.59/878,140.65 = 360,817.88/x
  3. Step 3: Cross multiply
    636,489.59x = 878,140.65 × 360,817.88
  4. Step 4: Simplify right side
    636,489.59x = 316,848,843,622.39
  5. Step 5: Solve for x
    x = 316,848,843,622.39/636,489.59
  6. Step 6: Final answer
    x = 497,806.80

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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.