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Finding the Fourth Proportional to 488,490.96, 674,446.50 and 305,008.90

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Solution

The fourth proportional to 488,490.96, 674,446.50 and 305,008.90 is: 421,117.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,490.96 : 674,446.50 = 305,008.90 : x
  2. Step 2: Convert to fraction form
    488,490.96/674,446.50 = 305,008.90/x
  3. Step 3: Cross multiply
    488,490.96x = 674,446.50 × 305,008.90
  4. Step 4: Simplify right side
    488,490.96x = 205,712,185,073.85
  5. Step 5: Solve for x
    x = 205,712,185,073.85/488,490.96
  6. Step 6: Final answer
    x = 421,117.69

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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.