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Finding the Fourth Proportional to 478,638.28, 660,520.82 and 263,778.35

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Solution

The fourth proportional to 478,638.28, 660,520.82 and 263,778.35 is: 364,014.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,638.28 : 660,520.82 = 263,778.35 : x
  2. Step 2: Convert to fraction form
    478,638.28/660,520.82 = 263,778.35/x
  3. Step 3: Cross multiply
    478,638.28x = 660,520.82 × 263,778.35
  4. Step 4: Simplify right side
    478,638.28x = 174,231,089,646.40
  5. Step 5: Solve for x
    x = 174,231,089,646.40/478,638.28
  6. Step 6: Final answer
    x = 364,014.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.