Home / 1,393,144.11-1,922,560.52-781,432.65

Finding the Fourth Proportional to 1,393,144.11, 1,922,560.52 and 781,432.65

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Solution

The fourth proportional to 1,393,144.11, 1,922,560.52 and 781,432.65 is: 1,078,389.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,144.11 : 1,922,560.52 = 781,432.65 : x
  2. Step 2: Convert to fraction form
    1,393,144.11/1,922,560.52 = 781,432.65/x
  3. Step 3: Cross multiply
    1,393,144.11x = 1,922,560.52 × 781,432.65
  4. Step 4: Simplify right side
    1,393,144.11x = 1,502,351,558,021.81
  5. Step 5: Solve for x
    x = 1,502,351,558,021.81/1,393,144.11
  6. Step 6: Final answer
    x = 1,078,389.20

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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.