Home / 399,639.70-551,496.26-218,347.73

Finding the Fourth Proportional to 399,639.70, 551,496.26 and 218,347.73

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Solution

The fourth proportional to 399,639.70, 551,496.26 and 218,347.73 is: 301,316.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,639.70 : 551,496.26 = 218,347.73 : x
  2. Step 2: Convert to fraction form
    399,639.70/551,496.26 = 218,347.73/x
  3. Step 3: Cross multiply
    399,639.70x = 551,496.26 × 218,347.73
  4. Step 4: Simplify right side
    399,639.70x = 120,417,953,717.01
  5. Step 5: Solve for x
    x = 120,417,953,717.01/399,639.70
  6. Step 6: Final answer
    x = 301,316.30

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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.