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Finding the Fourth Proportional to 287,453.20, 401,909.60 and 287,453.20

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Solution

The fourth proportional to 287,453.20, 401,909.60 and 287,453.20 is: 401,909.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,453.20 : 401,909.60 = 287,453.20 : x
  2. Step 2: Convert to fraction form
    287,453.20/401,909.60 = 287,453.20/x
  3. Step 3: Cross multiply
    287,453.20x = 401,909.60 × 287,453.20
  4. Step 4: Simplify right side
    287,453.20x = 115,530,200,630.72
  5. Step 5: Solve for x
    x = 115,530,200,630.72/287,453.20
  6. Step 6: Final answer
    x = 401,909.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.