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Finding the Fourth Proportional to 290,627.20, 435,940.80 and 268,975.90

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Solution

The fourth proportional to 290,627.20, 435,940.80 and 268,975.90 is: 403,463.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,627.20 : 435,940.80 = 268,975.90 : x
  2. Step 2: Convert to fraction form
    290,627.20/435,940.80 = 268,975.90/x
  3. Step 3: Cross multiply
    290,627.20x = 435,940.80 × 268,975.90
  4. Step 4: Simplify right side
    290,627.20x = 117,257,569,026.72
  5. Step 5: Solve for x
    x = 117,257,569,026.72/290,627.20
  6. Step 6: Final answer
    x = 403,463.85

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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.