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Finding the Fourth Proportional to 538,739.67, 808,043.49 and 139,347.30

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Solution

The fourth proportional to 538,739.67, 808,043.49 and 139,347.30 is: 209,003.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,739.67 : 808,043.49 = 139,347.30 : x
  2. Step 2: Convert to fraction form
    538,739.67/808,043.49 = 139,347.30/x
  3. Step 3: Cross multiply
    538,739.67x = 808,043.49 × 139,347.30
  4. Step 4: Simplify right side
    538,739.67x = 112,598,678,614.08
  5. Step 5: Solve for x
    x = 112,598,678,614.08/538,739.67
  6. Step 6: Final answer
    x = 209,003.87

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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.