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Finding the Fourth Proportional to 666,530.28, 999,899.10 and 217,146.53

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Solution

The fourth proportional to 666,530.28, 999,899.10 and 217,146.53 is: 325,753.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,530.28 : 999,899.10 = 217,146.53 : x
  2. Step 2: Convert to fraction form
    666,530.28/999,899.10 = 217,146.53/x
  3. Step 3: Cross multiply
    666,530.28x = 999,899.10 × 217,146.53
  4. Step 4: Simplify right side
    666,530.28x = 217,124,622,414.87
  5. Step 5: Solve for x
    x = 217,124,622,414.87/666,530.28
  6. Step 6: Final answer
    x = 325,753.58

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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.