Home / 389,974.60-584,087.10-319,990.60

Finding the Fourth Proportional to 389,974.60, 584,087.10 and 319,990.60

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Solution

The fourth proportional to 389,974.60, 584,087.10 and 319,990.60 is: 479,268.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,974.60 : 584,087.10 = 319,990.60 : x
  2. Step 2: Convert to fraction form
    389,974.60/584,087.10 = 319,990.60/x
  3. Step 3: Cross multiply
    389,974.60x = 584,087.10 × 319,990.60
  4. Step 4: Simplify right side
    389,974.60x = 186,902,381,581.26
  5. Step 5: Solve for x
    x = 186,902,381,581.26/389,974.60
  6. Step 6: Final answer
    x = 479,268.09

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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.