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Finding the Fourth Proportional to 666,899.50, 920,321.36 and 365,093.50

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Solution

The fourth proportional to 666,899.50, 920,321.36 and 365,093.50 is: 503,829.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,899.50 : 920,321.36 = 365,093.50 : x
  2. Step 2: Convert to fraction form
    666,899.50/920,321.36 = 365,093.50/x
  3. Step 3: Cross multiply
    666,899.50x = 920,321.36 × 365,093.50
  4. Step 4: Simplify right side
    666,899.50x = 336,003,346,447.16
  5. Step 5: Solve for x
    x = 336,003,346,447.16/666,899.50
  6. Step 6: Final answer
    x = 503,829.06

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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.