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Finding the Fourth Proportional to 618,990.81, 854,003.12 and 373,884.00

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Solution

The fourth proportional to 618,990.81, 854,003.12 and 373,884.00 is: 515,836.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,990.81 : 854,003.12 = 373,884.00 : x
  2. Step 2: Convert to fraction form
    618,990.81/854,003.12 = 373,884.00/x
  3. Step 3: Cross multiply
    618,990.81x = 854,003.12 × 373,884.00
  4. Step 4: Simplify right side
    618,990.81x = 319,298,105,404.56
  5. Step 5: Solve for x
    x = 319,298,105,404.56/618,990.81
  6. Step 6: Final answer
    x = 515,836.58

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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.