Home / 1,028,812.10-1,420,453.89-642,216.11

Finding the Fourth Proportional to 1,028,812.10, 1,420,453.89 and 642,216.11

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Solution

The fourth proportional to 1,028,812.10, 1,420,453.89 and 642,216.11 is: 886,690.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028,812.10 : 1,420,453.89 = 642,216.11 : x
  2. Step 2: Convert to fraction form
    1,028,812.10/1,420,453.89 = 642,216.11/x
  3. Step 3: Cross multiply
    1,028,812.10x = 1,420,453.89 × 642,216.11
  4. Step 4: Simplify right side
    1,028,812.10x = 912,238,364,567.90
  5. Step 5: Solve for x
    x = 912,238,364,567.90/1,028,812.10
  6. Step 6: Final answer
    x = 886,690.94

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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.