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Finding the Fourth Proportional to 404,999.80, 607,499.70 and 389,447.80

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Solution

The fourth proportional to 404,999.80, 607,499.70 and 389,447.80 is: 584,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,999.80 : 607,499.70 = 389,447.80 : x
  2. Step 2: Convert to fraction form
    404,999.80/607,499.70 = 389,447.80/x
  3. Step 3: Cross multiply
    404,999.80x = 607,499.70 × 389,447.80
  4. Step 4: Simplify right side
    404,999.80x = 236,589,421,665.66
  5. Step 5: Solve for x
    x = 236,589,421,665.66/404,999.80
  6. Step 6: Final answer
    x = 584,171.70

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1.5x scale

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.