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Finding the Fourth Proportional to 1,555,800, 2,147,004.06 and 840,408

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Solution

The fourth proportional to 1,555,800, 2,147,004.06 and 840,408 is: 1,159,763.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,800 : 2,147,004.06 = 840,408 : x
  2. Step 2: Convert to fraction form
    1,555,800/2,147,004.06 = 840,408/x
  3. Step 3: Cross multiply
    1,555,800x = 2,147,004.06 × 840,408
  4. Step 4: Simplify right side
    1,555,800x = 1,804,359,388,056.48
  5. Step 5: Solve for x
    x = 1,804,359,388,056.48/1,555,800
  6. Step 6: Final answer
    x = 1,159,763.07

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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.