Home / 1,222,765.91-1,687,469.65-678,901.77

Finding the Fourth Proportional to 1,222,765.91, 1,687,469.65 and 678,901.77

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Solution

The fourth proportional to 1,222,765.91, 1,687,469.65 and 678,901.77 is: 936,913.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,765.91 : 1,687,469.65 = 678,901.77 : x
  2. Step 2: Convert to fraction form
    1,222,765.91/1,687,469.65 = 678,901.77/x
  3. Step 3: Cross multiply
    1,222,765.91x = 1,687,469.65 × 678,901.77
  4. Step 4: Simplify right side
    1,222,765.91x = 1,145,626,129,684.86
  5. Step 5: Solve for x
    x = 1,145,626,129,684.86/1,222,765.91
  6. Step 6: Final answer
    x = 936,913.70

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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.