Home / 399,529.19-551,329.20-218,238.50

Finding the Fourth Proportional to 399,529.19, 551,329.20 and 218,238.50

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Solution

The fourth proportional to 399,529.19, 551,329.20 and 218,238.50 is: 301,157.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,529.19 : 551,329.20 = 218,238.50 : x
  2. Step 2: Convert to fraction form
    399,529.19/551,329.20 = 218,238.50/x
  3. Step 3: Cross multiply
    399,529.19x = 551,329.20 × 218,238.50
  4. Step 4: Simplify right side
    399,529.19x = 120,321,258,992.52
  5. Step 5: Solve for x
    x = 120,321,258,992.52/399,529.19
  6. Step 6: Final answer
    x = 301,157.62

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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.