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Finding the Fourth Proportional to 400,650.80, 599,809.80 and 388,986.80

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Solution

The fourth proportional to 400,650.80, 599,809.80 and 388,986.80 is: 582,347.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,650.80 : 599,809.80 = 388,986.80 : x
  2. Step 2: Convert to fraction form
    400,650.80/599,809.80 = 388,986.80/x
  3. Step 3: Cross multiply
    400,650.80x = 599,809.80 × 388,986.80
  4. Step 4: Simplify right side
    400,650.80x = 233,318,094,710.64
  5. Step 5: Solve for x
    x = 233,318,094,710.64/400,650.80
  6. Step 6: Final answer
    x = 582,347.76

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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.