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Finding the Fourth Proportional to 483,690.80, 724,661.40 and 394,461.20

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Solution

The fourth proportional to 483,690.80, 724,661.40 and 394,461.20 is: 590,978.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,690.80 : 724,661.40 = 394,461.20 : x
  2. Step 2: Convert to fraction form
    483,690.80/724,661.40 = 394,461.20/x
  3. Step 3: Cross multiply
    483,690.80x = 724,661.40 × 394,461.20
  4. Step 4: Simplify right side
    483,690.80x = 285,850,805,437.68
  5. Step 5: Solve for x
    x = 285,850,805,437.68/483,690.80
  6. Step 6: Final answer
    x = 590,978.38

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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.