Home / 1,211,871-1,672,372.80-668,006.76

Finding the Fourth Proportional to 1,211,871, 1,672,372.80 and 668,006.76

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Solution

The fourth proportional to 1,211,871, 1,672,372.80 and 668,006.76 is: 921,844.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,871 : 1,672,372.80 = 668,006.76 : x
  2. Step 2: Convert to fraction form
    1,211,871/1,672,372.80 = 668,006.76/x
  3. Step 3: Cross multiply
    1,211,871x = 1,672,372.80 × 668,006.76
  4. Step 4: Simplify right side
    1,211,871x = 1,117,156,335,640.13
  5. Step 5: Solve for x
    x = 1,117,156,335,640.13/1,211,871
  6. Step 6: Final answer
    x = 921,844.27

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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.