Home / 918,821.80-1,378,383.90-287,583.40

Finding the Fourth Proportional to 918,821.80, 1,378,383.90 and 287,583.40

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Solution

The fourth proportional to 918,821.80, 1,378,383.90 and 287,583.40 is: 431,422.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,821.80 : 1,378,383.90 = 287,583.40 : x
  2. Step 2: Convert to fraction form
    918,821.80/1,378,383.90 = 287,583.40/x
  3. Step 3: Cross multiply
    918,821.80x = 1,378,383.90 × 287,583.40
  4. Step 4: Simplify right side
    918,821.80x = 396,400,328,467.26
  5. Step 5: Solve for x
    x = 396,400,328,467.26/918,821.80
  6. Step 6: Final answer
    x = 431,422.42

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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.