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Finding the Fourth Proportional to 618,899.01, 854,360.40 and 389,793

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Solution

The fourth proportional to 618,899.01, 854,360.40 and 389,793 is: 538,090.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,899.01 : 854,360.40 = 389,793 : x
  2. Step 2: Convert to fraction form
    618,899.01/854,360.40 = 389,793/x
  3. Step 3: Cross multiply
    618,899.01x = 854,360.40 × 389,793
  4. Step 4: Simplify right side
    618,899.01x = 333,023,703,397.20
  5. Step 5: Solve for x
    x = 333,023,703,397.20/618,899.01
  6. Step 6: Final answer
    x = 538,090.54

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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.