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Finding the Fourth Proportional to 1,117,612, 1,675,251 and 518,078.80

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Solution

The fourth proportional to 1,117,612, 1,675,251 and 518,078.80 is: 776,577.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117,612 : 1,675,251 = 518,078.80 : x
  2. Step 2: Convert to fraction form
    1,117,612/1,675,251 = 518,078.80/x
  3. Step 3: Cross multiply
    1,117,612x = 1,675,251 × 518,078.80
  4. Step 4: Simplify right side
    1,117,612x = 867,912,027,778.80
  5. Step 5: Solve for x
    x = 867,912,027,778.80/1,117,612
  6. Step 6: Final answer
    x = 776,577.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.