Home / 1,191.80-1,783.38-1,007.12

Finding the Fourth Proportional to 1,191.80, 1,783.38 and 1,007.12

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Solution

The fourth proportional to 1,191.80, 1,783.38 and 1,007.12 is: 1,507.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.80 : 1,783.38 = 1,007.12 : x
  2. Step 2: Convert to fraction form
    1,191.80/1,783.38 = 1,007.12/x
  3. Step 3: Cross multiply
    1,191.80x = 1,783.38 × 1,007.12
  4. Step 4: Simplify right side
    1,191.80x = 1,796,077.67
  5. Step 5: Solve for x
    x = 1,796,077.67/1,191.80
  6. Step 6: Final answer
    x = 1,507.03

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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.