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Finding the Fourth Proportional to 666,021.62, 918,496.38 and 436,495.31

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Solution

The fourth proportional to 666,021.62, 918,496.38 and 436,495.31 is: 601,961.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,021.62 : 918,496.38 = 436,495.31 : x
  2. Step 2: Convert to fraction form
    666,021.62/918,496.38 = 436,495.31/x
  3. Step 3: Cross multiply
    666,021.62x = 918,496.38 × 436,495.31
  4. Step 4: Simplify right side
    666,021.62x = 400,919,362,121.98
  5. Step 5: Solve for x
    x = 400,919,362,121.98/666,021.62
  6. Step 6: Final answer
    x = 601,961.48

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1.5x scale

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.