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Finding the Fourth Proportional to 1,555,797, 2,146,999.92 and 840,405

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Solution

The fourth proportional to 1,555,797, 2,146,999.92 and 840,405 is: 1,159,758.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,797 : 2,146,999.92 = 840,405 : x
  2. Step 2: Convert to fraction form
    1,555,797/2,146,999.92 = 840,405/x
  3. Step 3: Cross multiply
    1,555,797x = 2,146,999.92 × 840,405
  4. Step 4: Simplify right side
    1,555,797x = 1,804,349,467,767.60
  5. Step 5: Solve for x
    x = 1,804,349,467,767.60/1,555,797
  6. Step 6: Final answer
    x = 1,159,758.93

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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.