Home / 1,028,781.28-1,420,411.28-642,185.28

Finding the Fourth Proportional to 1,028,781.28, 1,420,411.28 and 642,185.28

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Solution

The fourth proportional to 1,028,781.28, 1,420,411.28 and 642,185.28 is: 886,648.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028,781.28 : 1,420,411.28 = 642,185.28 : x
  2. Step 2: Convert to fraction form
    1,028,781.28/1,420,411.28 = 642,185.28/x
  3. Step 3: Cross multiply
    1,028,781.28x = 1,420,411.28 × 642,185.28
  4. Step 4: Simplify right side
    1,028,781.28x = 912,167,215,561.96
  5. Step 5: Solve for x
    x = 912,167,215,561.96/1,028,781.28
  6. Step 6: Final answer
    x = 886,648.34

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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.