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Finding the Fourth Proportional to 387,794.51, 535,188.76 and 215,744.89

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Solution

The fourth proportional to 387,794.51, 535,188.76 and 215,744.89 is: 297,745.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,794.51 : 535,188.76 = 215,744.89 : x
  2. Step 2: Convert to fraction form
    387,794.51/535,188.76 = 215,744.89/x
  3. Step 3: Cross multiply
    387,794.51x = 535,188.76 × 215,744.89
  4. Step 4: Simplify right side
    387,794.51x = 115,464,241,493.41
  5. Step 5: Solve for x
    x = 115,464,241,493.41/387,794.51
  6. Step 6: Final answer
    x = 297,745.94

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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.