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Finding the Fourth Proportional to 488,687.52, 674,717.28 and 305,205.20

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Solution

The fourth proportional to 488,687.52, 674,717.28 and 305,205.20 is: 421,388.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,687.52 : 674,717.28 = 305,205.20 : x
  2. Step 2: Convert to fraction form
    488,687.52/674,717.28 = 305,205.20/x
  3. Step 3: Cross multiply
    488,687.52x = 674,717.28 × 305,205.20
  4. Step 4: Simplify right side
    488,687.52x = 205,927,222,385.86
  5. Step 5: Solve for x
    x = 205,927,222,385.86/488,687.52
  6. Step 6: Final answer
    x = 421,388.34

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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.