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Finding the Fourth Proportional to 347,591.72, 479,429.16 and 319,003.68

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Solution

The fourth proportional to 347,591.72, 479,429.16 and 319,003.68 is: 439,998.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,591.72 : 479,429.16 = 319,003.68 : x
  2. Step 2: Convert to fraction form
    347,591.72/479,429.16 = 319,003.68/x
  3. Step 3: Cross multiply
    347,591.72x = 479,429.16 × 319,003.68
  4. Step 4: Simplify right side
    347,591.72x = 152,939,666,339.31
  5. Step 5: Solve for x
    x = 152,939,666,339.31/347,591.72
  6. Step 6: Final answer
    x = 439,998.01

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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.