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Finding the Fourth Proportional to 666,343.98, 999,515.16 and 217,064.12

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Solution

The fourth proportional to 666,343.98, 999,515.16 and 217,064.12 is: 325,595.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,343.98 : 999,515.16 = 217,064.12 : x
  2. Step 2: Convert to fraction form
    666,343.98/999,515.16 = 217,064.12/x
  3. Step 3: Cross multiply
    666,343.98x = 999,515.16 × 217,064.12
  4. Step 4: Simplify right side
    666,343.98x = 216,958,873,634.48
  5. Step 5: Solve for x
    x = 216,958,873,634.48/666,343.98
  6. Step 6: Final answer
    x = 325,595.91

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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.