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Finding the Fourth Proportional to 638,993.57, 881,813.60 and 348,611.65

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Solution

The fourth proportional to 638,993.57, 881,813.60 and 348,611.65 is: 481,085.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,993.57 : 881,813.60 = 348,611.65 : x
  2. Step 2: Convert to fraction form
    638,993.57/881,813.60 = 348,611.65/x
  3. Step 3: Cross multiply
    638,993.57x = 881,813.60 × 348,611.65
  4. Step 4: Simplify right side
    638,993.57x = 307,410,495,421.45
  5. Step 5: Solve for x
    x = 307,410,495,421.45/638,993.57
  6. Step 6: Final answer
    x = 481,085.43

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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.