Home / 1,211,756.64-1,672,297.20-667,891.68

Finding the Fourth Proportional to 1,211,756.64, 1,672,297.20 and 667,891.68

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Solution

The fourth proportional to 1,211,756.64, 1,672,297.20 and 667,891.68 is: 921,730.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,756.64 : 1,672,297.20 = 667,891.68 : x
  2. Step 2: Convert to fraction form
    1,211,756.64/1,672,297.20 = 667,891.68/x
  3. Step 3: Cross multiply
    1,211,756.64x = 1,672,297.20 × 667,891.68
  4. Step 4: Simplify right side
    1,211,756.64x = 1,116,913,386,367.30
  5. Step 5: Solve for x
    x = 1,116,913,386,367.30/1,211,756.64
  6. Step 6: Final answer
    x = 921,730.77

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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.