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Finding the Fourth Proportional to 618,991.81, 854,004.50 and 373,885

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Solution

The fourth proportional to 618,991.81, 854,004.50 and 373,885 is: 515,837.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,991.81 : 854,004.50 = 373,885 : x
  2. Step 2: Convert to fraction form
    618,991.81/854,004.50 = 373,885/x
  3. Step 3: Cross multiply
    618,991.81x = 854,004.50 × 373,885
  4. Step 4: Simplify right side
    618,991.81x = 319,299,472,482.50
  5. Step 5: Solve for x
    x = 319,299,472,482.50/618,991.81
  6. Step 6: Final answer
    x = 515,837.96

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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.