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Finding the Fourth Proportional to 347,558.21, 479,221.70 and 278,592.54

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Solution

The fourth proportional to 347,558.21, 479,221.70 and 278,592.54 is: 384,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,558.21 : 479,221.70 = 278,592.54 : x
  2. Step 2: Convert to fraction form
    347,558.21/479,221.70 = 278,592.54/x
  3. Step 3: Cross multiply
    347,558.21x = 479,221.70 × 278,592.54
  4. Step 4: Simplify right side
    347,558.21x = 133,507,587,436.07
  5. Step 5: Solve for x
    x = 133,507,587,436.07/347,558.21
  6. Step 6: Final answer
    x = 384,130.15

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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.