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Finding the Fourth Proportional to 664,907.55, 916,949.61 and 529,388.88

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Solution

The fourth proportional to 664,907.55, 916,949.61 and 529,388.88 is: 730,060.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,907.55 : 916,949.61 = 529,388.88 : x
  2. Step 2: Convert to fraction form
    664,907.55/916,949.61 = 529,388.88/x
  3. Step 3: Cross multiply
    664,907.55x = 916,949.61 × 529,388.88
  4. Step 4: Simplify right side
    664,907.55x = 485,422,927,054.34
  5. Step 5: Solve for x
    x = 485,422,927,054.34/664,907.55
  6. Step 6: Final answer
    x = 730,060.78

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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.