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Finding the Fourth Proportional to 387,097.89, 534,203.54 and 212,670.34

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Solution

The fourth proportional to 387,097.89, 534,203.54 and 212,670.34 is: 293,489.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,097.89 : 534,203.54 = 212,670.34 : x
  2. Step 2: Convert to fraction form
    387,097.89/534,203.54 = 212,670.34/x
  3. Step 3: Cross multiply
    387,097.89x = 534,203.54 × 212,670.34
  4. Step 4: Simplify right side
    387,097.89x = 113,609,248,481.00
  5. Step 5: Solve for x
    x = 113,609,248,481.00/387,097.89
  6. Step 6: Final answer
    x = 293,489.71

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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.