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Finding the Fourth Proportional to 665,991.17, 919,049.15 and 364,178.69

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Solution

The fourth proportional to 665,991.17, 919,049.15 and 364,178.69 is: 502,556.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,991.17 : 919,049.15 = 364,178.69 : x
  2. Step 2: Convert to fraction form
    665,991.17/919,049.15 = 364,178.69/x
  3. Step 3: Cross multiply
    665,991.17x = 919,049.15 × 364,178.69
  4. Step 4: Simplify right side
    665,991.17x = 334,698,115,492.61
  5. Step 5: Solve for x
    x = 334,698,115,492.61/665,991.17
  6. Step 6: Final answer
    x = 502,556.39

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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.