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Finding the Fourth Proportional to 486,626.06, 728,921.22 and 391,340.30

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Solution

The fourth proportional to 486,626.06, 728,921.22 and 391,340.30 is: 586,191.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,626.06 : 728,921.22 = 391,340.30 : x
  2. Step 2: Convert to fraction form
    486,626.06/728,921.22 = 391,340.30/x
  3. Step 3: Cross multiply
    486,626.06x = 728,921.22 × 391,340.30
  4. Step 4: Simplify right side
    486,626.06x = 285,256,245,266.56
  5. Step 5: Solve for x
    x = 285,256,245,266.56/486,626.06
  6. Step 6: Final answer
    x = 586,191.89

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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.