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Finding the Fourth Proportional to 666,021.50, 918,496.22 and 436,495.17

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Solution

The fourth proportional to 666,021.50, 918,496.22 and 436,495.17 is: 601,961.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,021.50 : 918,496.22 = 436,495.17 : x
  2. Step 2: Convert to fraction form
    666,021.50/918,496.22 = 436,495.17/x
  3. Step 3: Cross multiply
    666,021.50x = 918,496.22 × 436,495.17
  4. Step 4: Simplify right side
    666,021.50x = 400,919,161,510.78
  5. Step 5: Solve for x
    x = 400,919,161,510.78/666,021.50
  6. Step 6: Final answer
    x = 601,961.29

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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.