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Finding the Fourth Proportional to 371,650.81, 512,979.43 and 218,738.07

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Solution

The fourth proportional to 371,650.81, 512,979.43 and 218,738.07 is: 301,918.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,650.81 : 512,979.43 = 218,738.07 : x
  2. Step 2: Convert to fraction form
    371,650.81/512,979.43 = 218,738.07/x
  3. Step 3: Cross multiply
    371,650.81x = 512,979.43 × 218,738.07
  4. Step 4: Simplify right side
    371,650.81x = 112,208,127,903.00
  5. Step 5: Solve for x
    x = 112,208,127,903.00/371,650.81
  6. Step 6: Final answer
    x = 301,918.16

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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.