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Finding the Fourth Proportional to 1,063,980.45, 1,468,834.56 and 821,719.17

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Solution

The fourth proportional to 1,063,980.45, 1,468,834.56 and 821,719.17 is: 1,134,390.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063,980.45 : 1,468,834.56 = 821,719.17 : x
  2. Step 2: Convert to fraction form
    1,063,980.45/1,468,834.56 = 821,719.17/x
  3. Step 3: Cross multiply
    1,063,980.45x = 1,468,834.56 × 821,719.17
  4. Step 4: Simplify right side
    1,063,980.45x = 1,206,969,515,510.52
  5. Step 5: Solve for x
    x = 1,206,969,515,510.52/1,063,980.45
  6. Step 6: Final answer
    x = 1,134,390.69

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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.