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Finding the Fourth Proportional to 556,850.88, 768,104.64 and 330,336

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Solution

The fourth proportional to 556,850.88, 768,104.64 and 330,336 is: 455,656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,850.88 : 768,104.64 = 330,336 : x
  2. Step 2: Convert to fraction form
    556,850.88/768,104.64 = 330,336/x
  3. Step 3: Cross multiply
    556,850.88x = 768,104.64 × 330,336
  4. Step 4: Simplify right side
    556,850.88x = 253,732,614,359.04
  5. Step 5: Solve for x
    x = 253,732,614,359.04/556,850.88
  6. Step 6: Final answer
    x = 455,656.30

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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.