Home / 1,216,318.32-1,678,240.89-726,192.64

Finding the Fourth Proportional to 1,216,318.32, 1,678,240.89 and 726,192.64

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Solution

The fourth proportional to 1,216,318.32, 1,678,240.89 and 726,192.64 is: 1,001,979.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,318.32 : 1,678,240.89 = 726,192.64 : x
  2. Step 2: Convert to fraction form
    1,216,318.32/1,678,240.89 = 726,192.64/x
  3. Step 3: Cross multiply
    1,216,318.32x = 1,678,240.89 × 726,192.64
  4. Step 4: Simplify right side
    1,216,318.32x = 1,218,726,174,073.85
  5. Step 5: Solve for x
    x = 1,218,726,174,073.85/1,216,318.32
  6. Step 6: Final answer
    x = 1,001,979.62

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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.