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Finding the Fourth Proportional to 624,991.61, 862,489.80 and 338,511.75

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Solution

The fourth proportional to 624,991.61, 862,489.80 and 338,511.75 is: 467,146.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,991.61 : 862,489.80 = 338,511.75 : x
  2. Step 2: Convert to fraction form
    624,991.61/862,489.80 = 338,511.75/x
  3. Step 3: Cross multiply
    624,991.61x = 862,489.80 × 338,511.75
  4. Step 4: Simplify right side
    624,991.61x = 291,962,931,555.15
  5. Step 5: Solve for x
    x = 291,962,931,555.15/624,991.61
  6. Step 6: Final answer
    x = 467,146.97

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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.