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Finding the Fourth Proportional to 538,043.85, 742,435.92 and 308,589.21

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Solution

The fourth proportional to 538,043.85, 742,435.92 and 308,589.21 is: 425,816.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,043.85 : 742,435.92 = 308,589.21 : x
  2. Step 2: Convert to fraction form
    538,043.85/742,435.92 = 308,589.21/x
  3. Step 3: Cross multiply
    538,043.85x = 742,435.92 × 308,589.21
  4. Step 4: Simplify right side
    538,043.85x = 229,107,714,028.42
  5. Step 5: Solve for x
    x = 229,107,714,028.42/538,043.85
  6. Step 6: Final answer
    x = 425,816.06

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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.