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Finding the Fourth Proportional to 478,500.48, 660,310.20 and 274,409.64

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Solution

The fourth proportional to 478,500.48, 660,310.20 and 274,409.64 is: 378,673.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,500.48 : 660,310.20 = 274,409.64 : x
  2. Step 2: Convert to fraction form
    478,500.48/660,310.20 = 274,409.64/x
  3. Step 3: Cross multiply
    478,500.48x = 660,310.20 × 274,409.64
  4. Step 4: Simplify right side
    478,500.48x = 181,195,484,270.33
  5. Step 5: Solve for x
    x = 181,195,484,270.33/478,500.48
  6. Step 6: Final answer
    x = 378,673.57

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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.