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Finding the Fourth Proportional to 387,973.98, 535,398.96 and 218,208.11

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Solution

The fourth proportional to 387,973.98, 535,398.96 and 218,208.11 is: 301,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,973.98 : 535,398.96 = 218,208.11 : x
  2. Step 2: Convert to fraction form
    387,973.98/535,398.96 = 218,208.11/x
  3. Step 3: Cross multiply
    387,973.98x = 535,398.96 × 218,208.11
  4. Step 4: Simplify right side
    387,973.98x = 116,828,392,480.57
  5. Step 5: Solve for x
    x = 116,828,392,480.57/387,973.98
  6. Step 6: Final answer
    x = 301,124.30

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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.