Home / 399,939.12-551,930.72-218,663.12

Finding the Fourth Proportional to 399,939.12, 551,930.72 and 218,663.12

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Solution

The fourth proportional to 399,939.12, 551,930.72 and 218,663.12 is: 301,763.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,939.12 : 551,930.72 = 218,663.12 : x
  2. Step 2: Convert to fraction form
    399,939.12/551,930.72 = 218,663.12/x
  3. Step 3: Cross multiply
    399,939.12x = 551,930.72 × 218,663.12
  4. Step 4: Simplify right side
    399,939.12x = 120,686,893,259.05
  5. Step 5: Solve for x
    x = 120,686,893,259.05/399,939.12
  6. Step 6: Final answer
    x = 301,763.16

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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.