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Finding the Fourth Proportional to 635,439.84, 877,031.20 and 393,829.80

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Solution

The fourth proportional to 635,439.84, 877,031.20 and 393,829.80 is: 543,562.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,439.84 : 877,031.20 = 393,829.80 : x
  2. Step 2: Convert to fraction form
    635,439.84/877,031.20 = 393,829.80/x
  3. Step 3: Cross multiply
    635,439.84x = 877,031.20 × 393,829.80
  4. Step 4: Simplify right side
    635,439.84x = 345,401,017,077.89
  5. Step 5: Solve for x
    x = 345,401,017,077.89/635,439.84
  6. Step 6: Final answer
    x = 543,562.11

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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.