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Finding the Fourth Proportional to 488,486.96, 674,440.98 and 305,004.90

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Solution

The fourth proportional to 488,486.96, 674,440.98 and 305,004.90 is: 421,112.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,486.96 : 674,440.98 = 305,004.90 : x
  2. Step 2: Convert to fraction form
    488,486.96/674,440.98 = 305,004.90/x
  3. Step 3: Cross multiply
    488,486.96x = 674,440.98 × 305,004.90
  4. Step 4: Simplify right side
    488,486.96x = 205,707,803,660.80
  5. Step 5: Solve for x
    x = 205,707,803,660.80/488,486.96
  6. Step 6: Final answer
    x = 421,112.17

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1.5x scale

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.