Home / 918,695.80-1,378,043.70-665,441.20

Finding the Fourth Proportional to 918,695.80, 1,378,043.70 and 665,441.20

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Solution

The fourth proportional to 918,695.80, 1,378,043.70 and 665,441.20 is: 998,161.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,695.80 : 1,378,043.70 = 665,441.20 : x
  2. Step 2: Convert to fraction form
    918,695.80/1,378,043.70 = 665,441.20/x
  3. Step 3: Cross multiply
    918,695.80x = 1,378,043.70 × 665,441.20
  4. Step 4: Simplify right side
    918,695.80x = 917,007,053,380.44
  5. Step 5: Solve for x
    x = 917,007,053,380.44/918,695.80
  6. Step 6: Final answer
    x = 998,161.80

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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.