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Finding the Fourth Proportional to 1,190.22, 1,642.47 and 659.16

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Solution

The fourth proportional to 1,190.22, 1,642.47 and 659.16 is: 909.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.22 : 1,642.47 = 659.16 : x
  2. Step 2: Convert to fraction form
    1,190.22/1,642.47 = 659.16/x
  3. Step 3: Cross multiply
    1,190.22x = 1,642.47 × 659.16
  4. Step 4: Simplify right side
    1,190.22x = 1,082,650.53
  5. Step 5: Solve for x
    x = 1,082,650.53/1,190.22
  6. Step 6: Final answer
    x = 909.62

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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.