Home / 1,185.20-1,775.45-1,117.76

Finding the Fourth Proportional to 1,185.20, 1,775.45 and 1,117.76

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Solution

The fourth proportional to 1,185.20, 1,775.45 and 1,117.76 is: 1,674.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.20 : 1,775.45 = 1,117.76 : x
  2. Step 2: Convert to fraction form
    1,185.20/1,775.45 = 1,117.76/x
  3. Step 3: Cross multiply
    1,185.20x = 1,775.45 × 1,117.76
  4. Step 4: Simplify right side
    1,185.20x = 1,984,512.53
  5. Step 5: Solve for x
    x = 1,984,512.53/1,185.20
  6. Step 6: Final answer
    x = 1,674.42

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1.5x scale

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.