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Finding the Fourth Proportional to 287,220.60, 430,830.90 and 269,505.90

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Solution

The fourth proportional to 287,220.60, 430,830.90 and 269,505.90 is: 404,258.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,220.60 : 430,830.90 = 269,505.90 : x
  2. Step 2: Convert to fraction form
    287,220.60/430,830.90 = 269,505.90/x
  3. Step 3: Cross multiply
    287,220.60x = 430,830.90 × 269,505.90
  4. Step 4: Simplify right side
    287,220.60x = 116,111,469,452.31
  5. Step 5: Solve for x
    x = 116,111,469,452.31/287,220.60
  6. Step 6: Final answer
    x = 404,258.85

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1.5x scale

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.