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Finding the Fourth Proportional to 387,999.82, 535,378.02 and 218,201.14

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Solution

The fourth proportional to 387,999.82, 535,378.02 and 218,201.14 is: 301,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,999.82 : 535,378.02 = 218,201.14 : x
  2. Step 2: Convert to fraction form
    387,999.82/535,378.02 = 218,201.14/x
  3. Step 3: Cross multiply
    387,999.82x = 535,378.02 × 218,201.14
  4. Step 4: Simplify right side
    387,999.82x = 116,820,091,618.05
  5. Step 5: Solve for x
    x = 116,820,091,618.05/387,999.82
  6. Step 6: Final answer
    x = 301,082.85

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1.5x scale

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.