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Finding the Fourth Proportional to 488,999.10, 674,818.29 and 274,139.20

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Solution

The fourth proportional to 488,999.10, 674,818.29 and 274,139.20 is: 378,311.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,999.10 : 674,818.29 = 274,139.20 : x
  2. Step 2: Convert to fraction form
    488,999.10/674,818.29 = 274,139.20/x
  3. Step 3: Cross multiply
    488,999.10x = 674,818.29 × 274,139.20
  4. Step 4: Simplify right side
    488,999.10x = 184,994,146,165.97
  5. Step 5: Solve for x
    x = 184,994,146,165.97/488,999.10
  6. Step 6: Final answer
    x = 378,311.83

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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.