Home / 1,393,308.30-1,922,943.33-820,401.78

Finding the Fourth Proportional to 1,393,308.30, 1,922,943.33 and 820,401.78

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Solution

The fourth proportional to 1,393,308.30, 1,922,943.33 and 820,401.78 is: 1,132,259.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,308.30 : 1,922,943.33 = 820,401.78 : x
  2. Step 2: Convert to fraction form
    1,393,308.30/1,922,943.33 = 820,401.78/x
  3. Step 3: Cross multiply
    1,393,308.30x = 1,922,943.33 × 820,401.78
  4. Step 4: Simplify right side
    1,393,308.30x = 1,577,586,130,771.13
  5. Step 5: Solve for x
    x = 1,577,586,130,771.13/1,393,308.30
  6. Step 6: Final answer
    x = 1,132,259.19

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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.