Home / 399,638.40-551,494.55-218,346.44

Finding the Fourth Proportional to 399,638.40, 551,494.55 and 218,346.44

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Solution

The fourth proportional to 399,638.40, 551,494.55 and 218,346.44 is: 301,314.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,638.40 : 551,494.55 = 218,346.44 : x
  2. Step 2: Convert to fraction form
    399,638.40/551,494.55 = 218,346.44/x
  3. Step 3: Cross multiply
    399,638.40x = 551,494.55 × 218,346.44
  4. Step 4: Simplify right side
    399,638.40x = 120,416,867,822.70
  5. Step 5: Solve for x
    x = 120,416,867,822.70/399,638.40
  6. Step 6: Final answer
    x = 301,314.56

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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.