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Finding the Fourth Proportional to 387,700.62, 535,051.35 and 217,945.68

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Solution

The fourth proportional to 387,700.62, 535,051.35 and 217,945.68 is: 300,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,700.62 : 535,051.35 = 217,945.68 : x
  2. Step 2: Convert to fraction form
    387,700.62/535,051.35 = 217,945.68/x
  3. Step 3: Cross multiply
    387,700.62x = 535,051.35 × 217,945.68
  4. Step 4: Simplify right side
    387,700.62x = 116,612,130,310.67
  5. Step 5: Solve for x
    x = 116,612,130,310.67/387,700.62
  6. Step 6: Final answer
    x = 300,778.81

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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.