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Finding the Fourth Proportional to 639,672.93, 882,725.52 and 353,186.87

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Solution

The fourth proportional to 639,672.93, 882,725.52 and 353,186.87 is: 487,385.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,672.93 : 882,725.52 = 353,186.87 : x
  2. Step 2: Convert to fraction form
    639,672.93/882,725.52 = 353,186.87/x
  3. Step 3: Cross multiply
    639,672.93x = 882,725.52 × 353,186.87
  4. Step 4: Simplify right side
    639,672.93x = 311,767,059,064.30
  5. Step 5: Solve for x
    x = 311,767,059,064.30/639,672.93
  6. Step 6: Final answer
    x = 487,385.11

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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.