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Finding the Fourth Proportional to 253,915.80, 380,970.90 and 249,930.60

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Solution

The fourth proportional to 253,915.80, 380,970.90 and 249,930.60 is: 374,991.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,915.80 : 380,970.90 = 249,930.60 : x
  2. Step 2: Convert to fraction form
    253,915.80/380,970.90 = 249,930.60/x
  3. Step 3: Cross multiply
    253,915.80x = 380,970.90 × 249,930.60
  4. Step 4: Simplify right side
    253,915.80x = 95,216,285,619.54
  5. Step 5: Solve for x
    x = 95,216,285,619.54/253,915.80
  6. Step 6: Final answer
    x = 374,991.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.