Home / 399,786.03-551,705.68-218,500.13

Finding the Fourth Proportional to 399,786.03, 551,705.68 and 218,500.13

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Solution

The fourth proportional to 399,786.03, 551,705.68 and 218,500.13 is: 301,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,786.03 : 551,705.68 = 218,500.13 : x
  2. Step 2: Convert to fraction form
    399,786.03/551,705.68 = 218,500.13/x
  3. Step 3: Cross multiply
    399,786.03x = 551,705.68 × 218,500.13
  4. Step 4: Simplify right side
    399,786.03x = 120,547,764,454.13
  5. Step 5: Solve for x
    x = 120,547,764,454.13/399,786.03
  6. Step 6: Final answer
    x = 301,530.71

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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.