Home / 1,393,406.30-1,923,078.58-820,499.78

Finding the Fourth Proportional to 1,393,406.30, 1,923,078.58 and 820,499.78

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Solution

The fourth proportional to 1,393,406.30, 1,923,078.58 and 820,499.78 is: 1,132,394.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,406.30 : 1,923,078.58 = 820,499.78 : x
  2. Step 2: Convert to fraction form
    1,393,406.30/1,923,078.58 = 820,499.78/x
  3. Step 3: Cross multiply
    1,393,406.30x = 1,923,078.58 × 820,499.78
  4. Step 4: Simplify right side
    1,393,406.30x = 1,577,885,551,812.71
  5. Step 5: Solve for x
    x = 1,577,885,551,812.71/1,393,406.30
  6. Step 6: Final answer
    x = 1,132,394.44

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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.