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Finding the Fourth Proportional to 666,876, 920,288.93 and 365,070

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Solution

The fourth proportional to 666,876, 920,288.93 and 365,070 is: 503,796.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,876 : 920,288.93 = 365,070 : x
  2. Step 2: Convert to fraction form
    666,876/920,288.93 = 365,070/x
  3. Step 3: Cross multiply
    666,876x = 920,288.93 × 365,070
  4. Step 4: Simplify right side
    666,876x = 335,969,877,849.75
  5. Step 5: Solve for x
    x = 335,969,877,849.75/666,876
  6. Step 6: Final answer
    x = 503,796.62

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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.