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Finding the Fourth Proportional to 618,474.03, 853,618.91 and 422,763.50

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Solution

The fourth proportional to 618,474.03, 853,618.91 and 422,763.50 is: 583,498.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,474.03 : 853,618.91 = 422,763.50 : x
  2. Step 2: Convert to fraction form
    618,474.03/853,618.91 = 422,763.50/x
  3. Step 3: Cross multiply
    618,474.03x = 853,618.91 × 422,763.50
  4. Step 4: Simplify right side
    618,474.03x = 360,878,918,078.02
  5. Step 5: Solve for x
    x = 360,878,918,078.02/618,474.03
  6. Step 6: Final answer
    x = 583,498.90

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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.