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Finding the Fourth Proportional to 282,366.88, 389,672.60 and 155,043

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Solution

The fourth proportional to 282,366.88, 389,672.60 and 155,043 is: 213,962.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,366.88 : 389,672.60 = 155,043 : x
  2. Step 2: Convert to fraction form
    282,366.88/389,672.60 = 155,043/x
  3. Step 3: Cross multiply
    282,366.88x = 389,672.60 × 155,043
  4. Step 4: Simplify right side
    282,366.88x = 60,416,008,921.80
  5. Step 5: Solve for x
    x = 60,416,008,921.80/282,366.88
  6. Step 6: Final answer
    x = 213,962.80

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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.