Home / 387,979.05-535,405.93-218,213.17

Finding the Fourth Proportional to 387,979.05, 535,405.93 and 218,213.17

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Solution

The fourth proportional to 387,979.05, 535,405.93 and 218,213.17 is: 301,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,979.05 : 535,405.93 = 218,213.17 : x
  2. Step 2: Convert to fraction form
    387,979.05/535,405.93 = 218,213.17/x
  3. Step 3: Cross multiply
    387,979.05x = 535,405.93 × 218,213.17
  4. Step 4: Simplify right side
    387,979.05x = 116,832,625,222.10
  5. Step 5: Solve for x
    x = 116,832,625,222.10/387,979.05
  6. Step 6: Final answer
    x = 301,131.27

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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.