Home / 1,216,889.30-1,679,239.20-665,496.12

Finding the Fourth Proportional to 1,216,889.30, 1,679,239.20 and 665,496.12

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Solution

The fourth proportional to 1,216,889.30, 1,679,239.20 and 665,496.12 is: 918,347.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,889.30 : 1,679,239.20 = 665,496.12 : x
  2. Step 2: Convert to fraction form
    1,216,889.30/1,679,239.20 = 665,496.12/x
  3. Step 3: Cross multiply
    1,216,889.30x = 1,679,239.20 × 665,496.12
  4. Step 4: Simplify right side
    1,216,889.30x = 1,117,527,172,151.90
  5. Step 5: Solve for x
    x = 1,117,527,172,151.90/1,216,889.30
  6. Step 6: Final answer
    x = 918,347.44

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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.