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Finding the Fourth Proportional to 478,640.48, 660,523.86 and 263,780.54

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Solution

The fourth proportional to 478,640.48, 660,523.86 and 263,780.54 is: 364,017.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,640.48 : 660,523.86 = 263,780.54 : x
  2. Step 2: Convert to fraction form
    478,640.48/660,523.86 = 263,780.54/x
  3. Step 3: Cross multiply
    478,640.48x = 660,523.86 × 263,780.54
  4. Step 4: Simplify right side
    478,640.48x = 174,233,337,171.07
  5. Step 5: Solve for x
    x = 174,233,337,171.07/478,640.48
  6. Step 6: Final answer
    x = 364,017.14

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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.