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Finding the Fourth Proportional to 1,191.48, 1,785.84 and 574.32

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Solution

The fourth proportional to 1,191.48, 1,785.84 and 574.32 is: 860.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.48 : 1,785.84 = 574.32 : x
  2. Step 2: Convert to fraction form
    1,191.48/1,785.84 = 574.32/x
  3. Step 3: Cross multiply
    1,191.48x = 1,785.84 × 574.32
  4. Step 4: Simplify right side
    1,191.48x = 1,025,643.63
  5. Step 5: Solve for x
    x = 1,025,643.63/1,191.48
  6. Step 6: Final answer
    x = 860.81

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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.