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Finding the Fourth Proportional to 387,768.06, 535,109.49 and 218,013.12

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Solution

The fourth proportional to 387,768.06, 535,109.49 and 218,013.12 is: 300,852.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,768.06 : 535,109.49 = 218,013.12 : x
  2. Step 2: Convert to fraction form
    387,768.06/535,109.49 = 218,013.12/x
  3. Step 3: Cross multiply
    387,768.06x = 535,109.49 × 218,013.12
  4. Step 4: Simplify right side
    387,768.06x = 116,660,889,456.51
  5. Step 5: Solve for x
    x = 116,660,889,456.51/387,768.06
  6. Step 6: Final answer
    x = 300,852.24

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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.