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Finding the Fourth Proportional to 666,553.66, 999,980.56 and 211,172.36

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Solution

The fourth proportional to 666,553.66, 999,980.56 and 211,172.36 is: 316,806.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,553.66 : 999,980.56 = 211,172.36 : x
  2. Step 2: Convert to fraction form
    666,553.66/999,980.56 = 211,172.36/x
  3. Step 3: Cross multiply
    666,553.66x = 999,980.56 × 211,172.36
  4. Step 4: Simplify right side
    666,553.66x = 211,168,248,753.56
  5. Step 5: Solve for x
    x = 211,168,248,753.56/666,553.66
  6. Step 6: Final answer
    x = 316,806.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.