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Finding the Fourth Proportional to 486,627.56, 728,923.46 and 391,341.80

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Solution

The fourth proportional to 486,627.56, 728,923.46 and 391,341.80 is: 586,194.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,627.56 : 728,923.46 = 391,341.80 : x
  2. Step 2: Convert to fraction form
    486,627.56/728,923.46 = 391,341.80/x
  3. Step 3: Cross multiply
    486,627.56x = 728,923.46 × 391,341.80
  4. Step 4: Simplify right side
    486,627.56x = 285,258,218,898.63
  5. Step 5: Solve for x
    x = 285,258,218,898.63/486,627.56
  6. Step 6: Final answer
    x = 586,194.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.