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Finding the Fourth Proportional to 1,555,799, 2,147,002.68 and 840,407

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Solution

The fourth proportional to 1,555,799, 2,147,002.68 and 840,407 is: 1,159,761.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,799 : 2,147,002.68 = 840,407 : x
  2. Step 2: Convert to fraction form
    1,555,799/2,147,002.68 = 840,407/x
  3. Step 3: Cross multiply
    1,555,799x = 2,147,002.68 × 840,407
  4. Step 4: Simplify right side
    1,555,799x = 1,804,356,081,290.76
  5. Step 5: Solve for x
    x = 1,804,356,081,290.76/1,555,799
  6. Step 6: Final answer
    x = 1,159,761.69

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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.