Home / 1,004,120.81-1,385,340.30-641,756.78

Finding the Fourth Proportional to 1,004,120.81, 1,385,340.30 and 641,756.78

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Solution

The fourth proportional to 1,004,120.81, 1,385,340.30 and 641,756.78 is: 885,402.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004,120.81 : 1,385,340.30 = 641,756.78 : x
  2. Step 2: Convert to fraction form
    1,004,120.81/1,385,340.30 = 641,756.78/x
  3. Step 3: Cross multiply
    1,004,120.81x = 1,385,340.30 × 641,756.78
  4. Step 4: Simplify right side
    1,004,120.81x = 889,051,530,132.23
  5. Step 5: Solve for x
    x = 889,051,530,132.23/1,004,120.81
  6. Step 6: Final answer
    x = 885,402.95

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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.