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Finding the Fourth Proportional to 1,555,804, 2,147,009.58 and 840,412

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Solution

The fourth proportional to 1,555,804, 2,147,009.58 and 840,412 is: 1,159,768.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,804 : 2,147,009.58 = 840,412 : x
  2. Step 2: Convert to fraction form
    1,555,804/2,147,009.58 = 840,412/x
  3. Step 3: Cross multiply
    1,555,804x = 2,147,009.58 × 840,412
  4. Step 4: Simplify right side
    1,555,804x = 1,804,372,615,146.96
  5. Step 5: Solve for x
    x = 1,804,372,615,146.96/1,555,804
  6. Step 6: Final answer
    x = 1,159,768.59

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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.