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Finding the Fourth Proportional to 1,174.19, 1,619.66 and 775.85

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Solution

The fourth proportional to 1,174.19, 1,619.66 and 775.85 is: 1,070.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.19 : 1,619.66 = 775.85 : x
  2. Step 2: Convert to fraction form
    1,174.19/1,619.66 = 775.85/x
  3. Step 3: Cross multiply
    1,174.19x = 1,619.66 × 775.85
  4. Step 4: Simplify right side
    1,174.19x = 1,256,601.23
  5. Step 5: Solve for x
    x = 1,256,601.23/1,174.19
  6. Step 6: Final answer
    x = 1,070.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.