Home / 1,208,405.90-1,667,642.93-664,583.78

Finding the Fourth Proportional to 1,208,405.90, 1,667,642.93 and 664,583.78

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Solution

The fourth proportional to 1,208,405.90, 1,667,642.93 and 664,583.78 is: 917,149.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,405.90 : 1,667,642.93 = 664,583.78 : x
  2. Step 2: Convert to fraction form
    1,208,405.90/1,667,642.93 = 664,583.78/x
  3. Step 3: Cross multiply
    1,208,405.90x = 1,667,642.93 × 664,583.78
  4. Step 4: Simplify right side
    1,208,405.90x = 1,108,288,442,109.68
  5. Step 5: Solve for x
    x = 1,108,288,442,109.68/1,208,405.90
  6. Step 6: Final answer
    x = 917,149.15

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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.