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Finding the Fourth Proportional to 1,231,930, 1,700,063.40 and 666,682

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Solution

The fourth proportional to 1,231,930, 1,700,063.40 and 666,682 is: 920,021.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,930 : 1,700,063.40 = 666,682 : x
  2. Step 2: Convert to fraction form
    1,231,930/1,700,063.40 = 666,682/x
  3. Step 3: Cross multiply
    1,231,930x = 1,700,063.40 × 666,682
  4. Step 4: Simplify right side
    1,231,930x = 1,133,401,667,638.80
  5. Step 5: Solve for x
    x = 1,133,401,667,638.80/1,231,930
  6. Step 6: Final answer
    x = 920,021.16

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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.