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Finding the Fourth Proportional to 666,487, 919,752.06 and 364,681

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Solution

The fourth proportional to 666,487, 919,752.06 and 364,681 is: 503,259.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,487 : 919,752.06 = 364,681 : x
  2. Step 2: Convert to fraction form
    666,487/919,752.06 = 364,681/x
  3. Step 3: Cross multiply
    666,487x = 919,752.06 × 364,681
  4. Step 4: Simplify right side
    666,487x = 335,416,100,992.86
  5. Step 5: Solve for x
    x = 335,416,100,992.86/666,487
  6. Step 6: Final answer
    x = 503,259.78

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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.