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Finding the Fourth Proportional to 666,663.50, 1,000,099.13 and 217,280.11

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Solution

The fourth proportional to 666,663.50, 1,000,099.13 and 217,280.11 is: 325,954.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,663.50 : 1,000,099.13 = 217,280.11 : x
  2. Step 2: Convert to fraction form
    666,663.50/1,000,099.13 = 217,280.11/x
  3. Step 3: Cross multiply
    666,663.50x = 1,000,099.13 × 217,280.11
  4. Step 4: Simplify right side
    666,663.50x = 217,301,648,977.30
  5. Step 5: Solve for x
    x = 217,301,648,977.30/666,663.50
  6. Step 6: Final answer
    x = 325,954.02

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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.