Home / 820,619.46-1,231,467.42-288,126.78

Finding the Fourth Proportional to 820,619.46, 1,231,467.42 and 288,126.78

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Solution

The fourth proportional to 820,619.46, 1,231,467.42 and 288,126.78 is: 432,379.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,619.46 : 1,231,467.42 = 288,126.78 : x
  2. Step 2: Convert to fraction form
    820,619.46/1,231,467.42 = 288,126.78/x
  3. Step 3: Cross multiply
    820,619.46x = 1,231,467.42 × 288,126.78
  4. Step 4: Simplify right side
    820,619.46x = 354,818,742,399.51
  5. Step 5: Solve for x
    x = 354,818,742,399.51/820,619.46
  6. Step 6: Final answer
    x = 432,379.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.