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Finding the Fourth Proportional to 505,877.60, 760,128.60 and 448,140.80

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Solution

The fourth proportional to 505,877.60, 760,128.60 and 448,140.80 is: 673,373.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,877.60 : 760,128.60 = 448,140.80 : x
  2. Step 2: Convert to fraction form
    505,877.60/760,128.60 = 448,140.80/x
  3. Step 3: Cross multiply
    505,877.60x = 760,128.60 × 448,140.80
  4. Step 4: Simplify right side
    505,877.60x = 340,644,638,906.88
  5. Step 5: Solve for x
    x = 340,644,638,906.88/505,877.60
  6. Step 6: Final answer
    x = 673,373.64

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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.